r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 641

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

15.3.9
SSTRSR is a shift register that transmits and receives serial data.
When data is transferred from SSTDR to SSTRSR, bit 0 of transmit data is bit 0 in the SSTDR
contents (MLS = 0: LSB first communication) and is bit 7 in the SSTDR contents (MLS = 1: MSB
first communication). The SSU transfers data from the LSB (bit 0) in SSTRSR to the SSO pin to
perform serial data transmission.
In reception, the SSU sets serial data that has been input via the SSI pin in SSTRSR from the LSB
(bit 0). When 1-byte data has been received, the SSTRSR contents are automatically transferred to
SSRDR. SSTRSR cannot be directly accessed by the CPU.
SS Shift Register (SSTRSR)
Initial value:
R/W:
Bit:
7
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Section 15 Synchronous Serial Communication Unit (SSU)
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Rev. 1.00 Sep. 21, 2007 Page 615 of 1124
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REJ09B0402-0100