Renesas Hitachi H8S/2191, Hardware Manual

Page: 471 / 1065

Rev. 2.0, 11/00, page 444 of 1037
23.1.3 Pin Configuration
Table 23.1 shows the serial pins used by the SCI1.
Table 23.1 SCI Pins
Channel Pin Name Symbol I/O Function
Serial clock pin 1 SCK1 I/O SCI1 clock input/output
Receive data pin 1 SI1 Input SCI1 receive data input
1
Transmit data pin 1 SO1 Output SCI1 transmit data output
23.1.4 Register Configuration
The SCI1 has the internal registers shown in table 23.2. These registers are used to specify
asynchronous mode or synchronous mode, the data format, and the bit rate, and to control the
transmitter/receiver.
Table 23.2 SCI Registers
Channel Name Abbrev. R/W Initial Value Address
* 1
Serial mode register 1 SMR1 R/W H'00 H'D148
Bit rate register 1 BRR1 R/W H'FF H'D149
Serial control register 1 SCR1 R/W H'00 H'D14A
Transmit data register 1 TDR1 R/W H'FF H'D14B
Serial status register 1 SSR1 R/(W) *
2
H'84 H'D14C
Receive data register 1 RDR1 R H'00 H'D14D
1
Serial interface mode register 1 SCMR1 R/W H'F2 H'D14E
MSTPCRH R/W H'FF H'FFEC Common Module stop control register
MSTPCRL R/W H'FF H'FFED
Notes: 1. Lower 16 bits of the address.
2. Only 0 can be written, to clear flags.