Rohm LAPIS SEMICONDUCTOR ML620Q503, User Manual

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ML620Q503/Q504 User’s Manual
Chapter 19 Port 2
FEUL620Q504 19–1
19 Port 2
19.1 Overview
This LSI includes Port 2 (P20 to P23) which is an 4-bit input/output port.
This port can have external interrupts, SA-ADC, RC-ADC, SSIOF, UARTF and FTIMER output functions as secondary,
tertiary and quartic functions.
See the following chapters for reference:
FTM: Chapter 9 “Function Timer”
SSIOF: Chapter 12 “SSIO with FIFO”
UARTF: Chapter 14 “UART with FIFO”
RC-ADC:
Chapter 24 “RC Oscillation type A/D converter”
SA-ADC: Chapter 25 “Successive approximate type A/D converter”
19.1.1 Features
•
Allows selection of high-impedance output, P-channel open drain output, N-channel open drain output, or CMOS
output for each bit in output mode.
•
Allows selection of high-impedance input, input with a pull-down resistor, or input with a pull-up resistor for each bit
in input mode.
•
External interrupt inputs(EXI20,EXI21,EXI22,EXI23), the SA-ADC inputs (AIN4, AIN5, AIN6, AIN7), RC-ADC
(channel 1) oscillation pins (IN1, CS1, RS1, RT1), SSIO with FIFO pins (SINF0, SCKF0, SOUTF0, SSF0), UART
with FIFO pins (RXDF0, TXDF0), TIMER output pin (TMOUT2, TMOUT3) .
19.1.2 Configuration
Figure 19-1 shows the configuration of Port 2.
P2D :
Port 2 data register
P2DIR :
Port 2 direction register
P2CON :
Port 2 control register
P2MOD :
Port 2 mode register
Figure 19-1 Configuration of Port 2
Data bus
Outputs for SSIOF
(SCKF0,SOUTF0,SSF0)
Output for UARTF (TXDF0)
Outputs for RC-ADC
(CS1, RS1, RT1)
Output for TIMER
(TMOUT2,TMOUT3)
P20
to P23
P2DIR
P2MOD
P2CON
V
DD
V
DD
V
SS
V
SS
4
8
Port2
Output
Controller
P2D
V
DD
V
SS
Pull-up
Pull-down
Controller
Inputs for SSIOF (SINF0)
Input for UARTF (RXDF0)
Input for RC-ADC (IN0)
External Interrupt (EXI20 to EXI23)
3
4
Inputs for SA-ADC
(AIN4, AIN5, AIN6, AIN7)
4
1