r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 543

• 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
25.3.4
Table 25.4
Notes:
SSUMS and BIDE: Bits in SSMR2 register
MSS: Bit in SSCRH register
TE and RE: Bits in SSER register
Clock synchronous
communication mode
4-wire bus
communication mode
4-wire bus
(bidirectional)
communication mode
Communication Mode
1. This pin can be used as a programmable I/O port.
2. Do not set both bits TE and RE to 1 in 4-wire bus (bidirectional) communication mode.
Synchronous serial communication unit switches the functions of the I/O pins in each communication mode
according to the setting of the MSS bit in the SSCRH register and bits RE and TE in the SSER register.
Table 25.4 shows the Association between Communication Modes and I/O Pins.
Communication Modes and Pin Functions
Association between Communication Modes and I/O Pins
(2)
0
1
1
SSUMS
Disabled 0
0
1
BIDE
Bit Setting
1
0
1
0
1
MSS
25. Synchronous Serial Communication Unit (SSU)
0
1
0
1
0
1
0
1
0
1
0
1
TE
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
0
RE
Input
−
Input
Input
−
Input
−
Output
Output
Input
−
Input
−
−
−
−
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
SSI
Pin State
Output
Output
Output
−
Output
−
Output
Input
−
Input
−
Output
Input
Output
Input
Output
SSO
(1)
(1)
(1)
(1)
Page 511 of 740
Input
Input
Input
Output
Output
Output
Input
Input
Input
Output
Output
Output
Input
Input
Output
Output
SSCK