
454
Chapter 30 I/O Ports
3.Port Register Settings
3. Port Register Settings
3.1 General Rules
For all ports, the following rules are valid:
1. All port inputs are disabled by default to avoid transverse current floating before the ports are
configured by software. After configuring each port pin according to its function it is necessary to enable the
port inputs with the global port enable (PORTEN.GPORTEN). See section
Port Input Enable on page 457
.
2. Each port has a Port Data Register direct read (PDRD) to sample the pin data with CLKP. This register is
read-only.
3. Each port has a Data Direction Register (DDR) to switch the port's input/output direction. After reset, all
ports are input (DDR=0x00).
• Port Input mode (PFR = "0" and DDR = "0")
PDRD read : Reads the sampled pin data.
PDR read
: Reads the sampled pin data.
PDR write
: Writes the PDR setting value, has no effect on the pin value.
• Port Output mode (PFR = "0" and DDR = "1")
PDRD read : Reads the sampled pin data.
PDR read
: Reads the PDR register value.
PDR write
: Writes the PDR setting value to the corresponding external pins.
4. On a Read-Modify-Write instruction (bit operations) always the PDR register is read independent of the
Data Direction Register (DDR) settings.
5. Certain ports have a Port Function Register (PFR) and an Extra Port Function Register (EPFR). To enable
the function determined by EPFR=’1’ it is necessary to also set PFR=’1’. On MB91V460 the behaviour of
setting EPFR=’1’ and PFR=’0’ equals the port input/output mode (reserved for future use).
6. Each port has a Port Input Level Register (PILR) to bit-wise select the input level (CMOS-Hysteresis /
Automotive [/ TTL]). The default value depends on the function of the port.
The input level can be set in every device mode. See section
Port Input Level Selection on page 498
.
7. Certain ports have programmable Pull-Ups/Pull-Downs (50 kOhm) which are enabled bit-wise by their Pull-
Up/Pull-Down Enable Registers (PPER) and Pull-Up/Pull-Down Control Registers (PPCR). See section
Programmable Pull-Up/Pull Down Resistors on page 500
.
8. Each port has one or two Port Function Registers: PFR and, if necessary, Extra PFR (EPFR). Together,
they can serve up to 3 resource I/O’s per pin. See section
Port Function Register Setup on page 458
.
9. Port setup controlled by the MD[2:0] pins and the mode register MODR overwrites the setup in the port
registers. E.g. External Bus Mode overwrites port register setup. The external bus signal output can be
disabled by setting the PFR of the pin to port mode (PFR=’0).
10.Resource input lines are generally connected to the pin and are enabled by setting the appropriate
functionality inside the resource. There are exceptions which are listed in
Port Function Register Setup on
page 458
.
11.External Interrupt input lines are always connected to the pin and are enabled in the External Interrupt
unit.
12.In STOP mode (STCR:STOP set and STCR:HIZ not set) all pins keep their state (input or output
depending on the configuration before entering the STOP mode) and the input stages and lines are
internally fixed to avoid transverse current. External interrupt input pins are not fixed if the corresponding
pin is selected by using the PFR=’1’ setting and the corresponding external interrupt is enabled with the
ENIR0, resp. ENIR1 registers. Pull-Ups and Pull-Downs are enabled.
13.In STOP-HIZ mode (STCR:STOP and STCR:HIZ set) all pins are switching to input (high impedance state)
and all input stages and lines are internally fixed to avoid floating. External interrupt input pins are not fixed
if the corresponding pin is selected by using the PFR=’1’ setting and the corresponding external interrupt is
enabled with the ENIR0, resp. ENIR1 registers. Pull-Ups and Pull-Downs are disabled.
Summary of Contents for FR Family FR60 Lite
Page 2: ...FUJITSU LIMITED ...
Page 3: ...FR60 32 BIT MICROCONTROLLER MB91460 Series User s Manual ...
Page 15: ...xi ...
Page 16: ...xii ...
Page 38: ...22 Chapter 2 MB91460 Rev A Rev B Overview 4 Block Diagram ...
Page 128: ...112 Chapter 4 CPU Architecture 9 Addressing ...
Page 153: ...137 Chapter 8 Device State Transition 3 State Transition Diagram ...
Page 154: ...138 Chapter 8 Device State Transition 3 State Transition Diagram ...
Page 169: ...153 Chapter 9 Reset 10 Caution ...
Page 170: ...154 Chapter 9 Reset 10 Caution ...
Page 180: ...164 Chapter 10 Standby 7 Q A ...
Page 182: ...166 Chapter 10 Standby 8 Caution ...
Page 199: ...183 Chapter 12 Instruction Cache 2 Main body structure Figure 2 3 I Cache Address Map ...
Page 200: ...184 Chapter 12 Instruction Cache 2 Main body structure Figure 2 4 I Cacheable Area ...
Page 222: ...206 Chapter 13 Clock Control 8 Caution ...
Page 232: ...216 Chapter 14 PLL Interface 7 Caution ...
Page 236: ...220 Chapter 15 CAN Clock Prescaler 3 Registers ...
Page 288: ...272 Chapter 19 Timebase Timer 8 Caution ...
Page 314: ...298 Chapter 22 Main Oscillation Stabilisation Timer 8 Caution ...
Page 326: ...310 Chapter 23 Sub Oscillation Stabilisation Timer 8 Caution ...
Page 348: ...332 Chapter 25 External Interrupt 8 Caution ...
Page 398: ...382 Chapter 26 DMA Controller 6 DMA External Interface ...
Page 402: ...386 Chapter 27 Delayed Interrupt 8 Caution ...
Page 412: ...396 Chapter 28 Bit Search 8 Caution ...
Page 521: ...505 Chapter 30 I O Ports 3 Port Register Settings ...
Page 522: ...506 Chapter 30 I O Ports 3 Port Register Settings ...
Page 574: ...558 Chapter 31 External Bus 4 Endian and Bus Access Byte Access ...
Page 628: ...612 Chapter 31 External Bus 13 Notes on Using the External Bus Interface ...
Page 706: ...690 Chapter 33 I2C Controller 4 Programming Flow Charts ...
Page 748: ...732 Chapter 34 CAN Controller 4 CAN Application ...
Page 762: ...746 Chapter 35 Free Run Timer 8 Caution ...
Page 790: ...774 Chapter 37 Output Compare 8 Caution ...
Page 838: ...822 Chapter 39 Programmable Pulse Generator 8 Caution ...
Page 850: ...834 Chapter 40 Pulse Frequency Modulator 4 PFM Operation and Setting ...
Page 886: ...870 Chapter 42 Sound Generator 3 Registers ...
Page 900: ...884 Chapter 43 Stepper Motor Controller 4 Caution ...
Page 939: ...923 Chapter 47 LCD Controller 3 Configuration Figure 3 2 Register List ...
Page 943: ...927 Chapter 47 LCD Controller 4 Registers Correspondence between VRAM and Common Segment Pins ...
Page 964: ...948 Chapter 48 Clock Monitor 8 Caution ...
Page 994: ...978 Chapter 51 Low Voltage Reset Interrupt 3 Registers ...
Page 998: ...982 Chapter 52 Regulator Control 3 Registers ...
Page 1008: ...992 Chapter 53 Fixed Mode Reset Vector BOOT ROM 5 Bootloader Update Strategy ...
Page 1024: ...1008 Chapter 54 Flash Memory 8 Caution ...
Page 1032: ...1016 Chapter 55 Flash Security 4 Register ...
Page 1034: ...1018 Chapter 56 Electrical Specification ...
Page 1035: ...FR60 MB91460 Series Hardware Manual European Microcontroller Design Centre Author MBo ...
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