UPD78F1502AGK-GAK-AX Datasheet, PDF (489/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 14 SERIAL ARRAY UNIT
14.5.1 Master transmission
Master transmission is that the 78K0R/Lx3 microcontrollers output a transfer clock and transmit data to another device.
3-Wire Serial I/O
Target channel
Pins used
Interrupt
Error detection flag
Transfer data length
Transfer rate
Data phase
Clock phase
Data direction
CSI00
CSI01
CSI10
CSI20
Channel 0 of SAU0
Channel 1 of SAU0
Channel 2 of SAU0
Channel 0 of SAU1
SCK00, SO00
SCK01, SO01
SCK10, SO10
SCK20, SO20
INTCSI00
INTCSI01
INTCSI10
INTCSI20
Transfer end interrupt (in single-transfer mode) or buffer empty interrupt (in continuous transfer mode)
can be selected.
None
7 or 8 bits
Max. fCLK/4 [MHz], Min. fCLK/(2 × 2¹¹ × 128) [MHz] ^Note
fCLK: System clock frequency
Selectable by DAPmn bit
• DAPmn = 0: Data output starts from the start of the operation of the serial clock.
• DAPmn = 1: Data output starts half a clock before the start of the serial clock operation.
Selectable by CKPmn bit
• CKPmn = 0: Forward
• CKPmn = 1: Reverse
MSB or LSB first
Note Use this operation within a range that satisfies the conditions above and the AC characteristics in the electrical
specifications (see CHAPTER 31 ELECTRICAL SPECIFICATIONS).
Remarks 1. For 78K0R/LF3, CSI00 and CSI01 are not mounted.
2. For 78K0R/LG3, CSI01 is not mounted.
R01UH0004EJ0501 Rev.5.01
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Jun 20, 2011