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22. Serial PROM Mode
22.6 Interface Specifications
TMP89FM42
RA002
22.6 Interface Specifications
The serial PROM mode supports two communication methods: UART and SIO. The communication method is
selected based on the first serial data value received after a reset.
To execute an on-board program, the communication format of the external controller (personal computer, micro-
controller, etc.) must be set as described below.
22.6.1 SIO communication
- Transfer rate: 250 kbps (Max.)
- Data length: 8 bits
- Slave (external clock)
- Hardware flow control (SO0 pin)
If the TMP89FM42 receives serial data "0x30" after a reset, it starts the SIO communication.
In the SIO communication, the TMP89FM42 functions as a slave device. Therefore, the external controller
must supply the TMP89FM42 with a serial clock (SCLK0 pin) for synchronization.
If the TMP89FM42 is not outputting serial data, it controls the hardware flow by using the SO0 pin. If inter-
nal data processing is not completed yet, though data has been received, the SO0 pin outputs the L level. If
internal data processing has progressed to a near-completion state or if it has been completed, the SO0 pin out-
puts the H level. The external controller must check the status of the SO0 pin before it starts to supply a serial
clock.
For information on the communication timings of each operation command, refer to " 1.11 AC Characteris-
tics (SIO) ".
22.6.2 UART communication
- Baud rate: 9600 to 128000 bps (automatic detection)
- Data length: 8 bits (LSB first)
- Parity bit: None
- STOP bit: 1 bit
If the TMP89FM42 receives serial data "0x86" after a reset, it starts the UART communication. It also mea-
sures the pulse width of the received data (0x86), and automatically establishes the reference baud rate. In all
subsequent data communication transactions, this reference baud rate is used. For information on the commu-
nication timings of each operation command, refer to "22.14 AC Characteristics (UART)".
Usable baud rates differ depending on the operating frequency and are shown in Table 22-4. However, there
is the possibility of data communication not working properly, even if a baud rate shown in Table 22-4 is used,
because data communication is affected by frequency errors of a resonator of the external controller (personal
computer, etc.), the load capacity of a communication pin, and various other factors.
Summary of Contents for TLCS-870/C1 Series
Page 1: ...8 Bit Microcontroller TLCS 870 C1 Series TMP89FM42 查询TMP89FM42供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...
Page 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Page 4: ......
Page 14: ......
Page 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Page 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Page 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Page 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Page 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Page 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Page 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Page 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Page 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Page 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Page 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Page 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Page 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Page 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Page 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Page 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Page 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Page 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Page 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Page 406: ...26 Package Dimensions TMP89FM42 ...
Page 408: ......