UPD70F3116 Datasheet, PDF (492/826 Pages) NEC – 32-Bit Single-Chip Microcontrollers

CHAPTER 10 SERIAL INTERFACE FUNCTION
(12) Serial I/O shift registers L0, L1 (SIOL0, SIOL1)
The SIOLn register is an 8-bit shift register that converts parallel data into serial data (n = 0, 1).
The transfer operation is not started even if the SIOLn register is read.
These registers are read-only, in 8-bit or 1-bit units.
In addition to reset input, this register can also be initialized by clearing (0) the CSICAEn bit of the CSIMn
register.
The SIOLn register is the same as the lower bytes of the SIOn register.
Caution Read the SIOLn register only when the 8-bit data length has been set (CCL bit of CSIMn
register = 0), and only in the idle state (CSOTn bit of CSIMn register = 0). If the SIOLn
register is read during data transfer, the data cannot be guaranteed.
SIOL0
7
SIO7
6
SIO6
5
SIO5
4
SIO4
3
SIO3
2
SIO2
1
SIO1
0
SIO0
Address Initial value
FFFFF90AH 00H
SIOL1
7
SIO7
6
SIO6
5
SIO5
4
SIO4
3
SIO3
2
SIO2
1
SIO1
0
SIO0
Address Initial value
FFFFF91AH 00H
Bit position
7 to 0
Bit name
Function
SIO7 to SIO0 Data is shifted in (reception) or shifted out (transmission) from the MSB or LSB
side.
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User’s Manual U14492EJ5V0UD