Section 14 Synchronous Serial Communication Unit (SSU)
Rev. 3.00 Mar. 14, 2006 Page 510 of 804
REJ09B0104-0300
Figure 14.1 shows a block diagram of the SSU.
SSO
SSCK (External clock)
Module data bus
SSCRH
CEI
SSTRSR
Selector
RXI
SSCRL
SSMR
SSER
SSSR
Control circuit
Clock
P
φ
P
φ
/4
P
φ
/8
P
φ
/16
P
φ
/32
P
φ
/64
P
φ
/128
P
φ
/256
Clock
selector
Internal data bus
Bus interface
SCS
SSI
Shiftout
Shiftin
OEI
TXI
TEI
[Legend]
SSCRH:
SSCRL:
SSCR2:
SSMR:
SSER:
SSSR:
SSTDR0 to SSTDR3:
SSRDR0 to SSRDR3:
SSTRSR:
SS control register H
SS control register L
SS control register 2
SS mode register
SS enable register
SS status register
SS transmit data registers 0 to 3
SS receive data registers 0 to 3
SS shift register
SSRDR 0
SSRDR 1
SSRDR 2
SSRDR 3
SSTDR 0
SSTDR 1
SSTDR 2
SSTDR 3
Figure 14.1 Block Diagram of SSU
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