CHAPTER 12 SERIAL INTERFACE UART6
Preliminary User’s Manual U16846EJ1V0UD
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(7) Input switch control register (ISC)
The input switch control register (ISC) is used to receive a status signal transmitted from the master during LIN
(Local Interconnect Network) reception. The input source is switched by setting ISC.
This register can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears this register to 00H.
Figure 12-11. Format of Input Switch Control Register (ISC)
Address: FF4FH After reset: 00H R/W
Symbol
7 6 5 4 3 2 1 0
ISC
0 0 0 0 0 0
ISC1
ISC0
ISC1
TI000 input source selection
0
TI000
(P00)
1
RxD6
(P14)
ISC0
INTP0 input source selection
0
INTP0
(P120)
1
RxD6
(P14)
(8) Port mode register 1 (PM1)
This register sets port 1 input/output in 1-bit units.
When using the P13/TxD6 pin for serial interface data output, clear PM13 to 0 and set the output latch of P13 to
1.
Set PM14 to 1 when using the P14/RxD6 pin as a serial interface data input pin. The output latch of P14 at this
time may be 0 or 1.
PM1 can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to FFH.
Figure 12-12. Format of Port Mode Register 1 (PM1)
Address: FF21H After reset: FFH R/W
Symbol
7 6 5 4 3 2 1 0
PM1
PM17 PM16 PM15 PM14 PM13 PM12 PM11 PM10
PM1n
P1n pin I/O mode selection (n = 0 to 7)
0
Output mode (output buffer on)
1
Input mode (output buffer off)