r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 554

• 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
Figure 25.11
TDRE bit in
SSSR register
TEND bit in
SSSR register
TDRE bit in
SSSR register
TEND bit in
SSSR register
• CPHS bit = 0 (data change at odd edges), CPOS bit = 0 (“H” when clock stops), and BS3 to
• CPHS bit = 1 (data change at even edges). CPOS bit = 0 (“H” when clock stops), and BS3 to
Processing
by program
Processing
by program
BS0 = 1000b (8 bits)
BS0 = 1000b (8 bits)
(output)
(output)
SSCK
SSCK
SSO
SCS
SCS
SSO
Example of Synchronous Serial Communication Unit Operation during Data
Transmission (4-Wire Bus Communication Mode, 8-Bit SSU Data Transfer Length)
BS0 to BS3: Bits in SSBR register
CPHS, CPOS: Bits in SSMR register
Data write to SSTDR register
Data write to SSTDR register
TXI interrupt request is
generated
TXI interrupt request is
generated
b7
b7
1 frame
b6
1 frame
b6
b0
b0
TXI interrupt request is
generated
TXI interrupt request is
generated
b7
25. Synchronous Serial Communication Unit (SSU)
1 frame
b7
b6
TEI interrupt request is
generated
TEI interrupt request is
generated
1 frame
b6
b0
b0
High-impedance
High-impedance
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