H8S2628_10 Datasheet, PDF (493/658 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 16 Synchronous Serial Communication Unit (SSU)
(1) When 8-bit data length is selected (SSTDR0 is valid) with CPOS = 0 and CPHS = 0
SCS
1 frame
1 frame
SSCK
SSO
TDRE
Bit Bit Bit Bit Bit Bit Bit Bit
01234567
SSTDR0 (LSB first transmission)
Bit Bit Bit Bit Bit Bit Bit Bit
76543210
SSTDR0 (MSB first transmission)
TEND
LSI operation
User operation
TXI
interrupt
generated
TEI
interrupt
generated
TXI
interrupt
generated
TEI
interrupt
generated
Data written to
SSTDR0
Data written to
SSTDR0
(2) When 16-bit data length is selected (SSTDR0 and SSTDR1 are valid) with CPOS = 0 and CPHS = 0
SCS
1 frame
SSCK
SSO
(LSB first)
SSO
(MSB first)
TDRE
Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit
0123456701234567
SSTDR1
SSTDR0
Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit
76543210 76543210
SSTDR0
SSTDR1
TEND
LSI operation
User operation _{Data written to}
SSTDR1 to SSTDR0
TXI interrupt generated
TEI interrupt generated
(3) When 32-bit data length is selected (SSTDR0, SSTDR1, SSTDR2, and SSTDR3 are valid) with CPOS = 0 and CPHS = 0
SCS
1 frame
SSCK
SSO
(LSB first)
SSO
(MSB first)
TDRE
Bit
0
to
Bit Bit
70
to
Bit Bit
70
to
Bit
7
Bit
0
to
Bit
7
SSTDR3
SSTDR2
SSTDR1
SSTDR0
Bit _to Bit Bit _to Bit Bit _to Bit Bit _to Bit
7
07
07
07
0
SSTDR0
SSTDR1
SSTDR2
SSTDR3
TEND
LSI operation
User operation Data written to
SSTDR3 to SSTDR0
TXI
TEI
interrupt interrupt
generated generated
Figure 16.5 Example of Transmission Operation
Rev. 4.00 Mar. 16, 2010 Page 445 of 606
REJ09B0155-0400