r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 538

• Manufacturer Part Number: r5f21346mnfp
• Description: Single-chip Mcus Incorporates The R8c Cpu Core
• Manufacturer: Renesas Electronics Corporation.

R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
25.2.11 SS Mode Register 2 (SSMR2)
Notes:
1. Refer to 25.3.2.1 Association between Data I/O Pins and SS Shift Register for information on combinations of
2. The SCS pin functions as a port, regardless of the values of bits CSS0 and CSS1 when the SSUMS bit is set to
3. This bit functions as the SCS input pin before starting transfer.
4. The BIDE bit is disabled when the SSUMS bit is set to 0 (clock synchronous communication mode).
5. When the SOOS bit is set to 0 (CMOS output), set the port direction register bits corresponding to pins SSI and
After Reset
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 019Dh
data I/O pins.
0 (clock synchronous communication mode).
SSO to 0 (input mode).
Symbol
SSUMS SSU mode select bit
SCKOS SSCK pin open drain output select
Symbol
CSOS
SOOS
Bit
SCKS
CSS0
CSS1
BIDE
BIDE
b7
0
SCS pin open drain output select
bit
Serial data pin open output drain
select bit
bit
SCS pin select bit
SSCK pin select bit
Bidirectional mode enable bit
SCKS
b6
(1)
0
Bit Name
CSS1
(2)
b5
0
(1)
CSS0
(1, 4)
b4
0
0: Clock synchronous communication mode
1: Four-wire bus communication mode
0: CMOS output
1: N-channel open-drain output
0: CMOS output
1: N-channel open-drain output
0: CMOS output
1: N-channel open-drain output
b5 b4
0: Functions as port
1: Functions as serial clock pin
0: Standard mode (communication using 2 pins of data
1: Bidirectional mode (communication using 1 pin of
0 0: Functions as port
0 1: Functions as SCS input pin
1 0: Functions as SCS output pin
1 1: Functions as SCS output pin
input and data output)
data input and data output)
SCKOS
b3
0
25. Synchronous Serial Communication Unit (SSU)
SOOS
b2
(5)
0
Function
CSOS
b1
0
(3)
(3)
SSUMS
b0
0
Page 506 of 740
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W