M306H2MC-XXXFP Datasheet, PDF (107/210 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA ACQUISITION CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306H2MC-XXXFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
with DATA ACQUISITION CONTROLLER
(1) Polarity select function
As shown in Figure 2.11.12 the CLK polarity select bit (bit 6 at addresses 03A416, 03AC16, 037C16)
allows selection of the polarity of the transfer clock.
• When CLK polarity select bit = “0”
CLKi
TXDi
RXDi
D0 D1 D2 D3 D4 D5 D6 D7
D0 D1 D2 D3 D4 D5 D6 D7
Note 1: The CLK pin level when not
transferring data is “H”.
• When CLK polarity select bit = “1”
CLKi
TXDi
D0 D1 D2 D3 D4 D5 D6 D7
RXDi
D0 D1 D2 D3 D4 D5 D6 D7
Note 2: The CLK pin level when not
transferring data is “L”.
Figure 2.11.12 Polarity of transfer clock
(2) LSB first/MSB first select function
As shown in Figure 2.11.13, when the transfer format select bit (bit 7 at addresses 03A416, 03AC16,
037C16) = “0”, the transfer format is “LSB first”; when the bit = “1”, the transfer format is “MSB first”.
• When transfer format select bit = “0”
CLKi
TXDi
D0 D1 D2 D3 D4 D5 D6 D7
RXDi
D0 D1 D2 D3 D4 D5 D6 D7
LSB first
• When transfer format select bit = “1”
CLKi
TXDi
RXDi
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
MSB first
Note: This applies when the CLK polarity select bit = “0”.
Figure 2.11.13 Transfer format
106
Rev. 1.0