Register Descriptions; Table 10.2 Sci1 Pin Configuration; Table 10.3 Registers - Renesas H8/3847R Series Hardware Manual

Section 10 Serial Communication Interface
3. Pin Configuration
Table 10.2 shows the SCI1 pin configuration.

Table 10.2 SCI1 Pin Configuration

Name
SCI1 clock
SCI1 data input
SCI1 data output
4. Register Configuration
Table 10.3 shows the SCI1 register configuration.

Table 10.3 Registers

Name
Serial control register 1
Serial control status register 1
Serial data register U
Serial data register L
Clock stop register 1
10.2.2

Register Descriptions

1. Serial Control Register 1 (SCR1)
Bit 7
SNC1
Initial value 0
Read/Write R/W
SCR1 is an 8-bit read/write register that controls the operating mode, serial clock source, and
prescaler division ratio.
Upon reset, SCR1 is initialized to H'00. If this register is written to during transfer, transfer will be
halted.
Rev. 6.00 Aug 04, 2006 page 334 of 680
REJ09B0145-0600
Abbr. I/O
SCK I/O
1
SI Input
1
SO Output
1
Abbr.
SCR1
SCSR1
SDRU
SDRL
CKSTPR1
6 5
SNC0 MRKON
0 0
R/W R/W
Function
SCI1 clock input/output
SCI1 receive data input
SCI1 transmit data output
R/W Initial Value
R/W H'00
R/W H'9C
R/W Undefined
R/W Undefined
R/W H'FF
4 3
LTCH CKS3 CKS2
0 0
R/W R/W R/W
Address
H'FFA0
H'FFA1
H'FFA2
H'FFA3
H'FFFA
2 1 0
CKS1 CKS0
0 0 0
R/W R/W