7906 Datasheet, PDF (76/531 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER

Figures 5.2.4 and 5.2.5 show the port peripheral circuits.
INPUT/OUTPUT PINS
5.2 Programmable I/O ports
P12/RXD0, P16/RXD1
P21/TA4IN, P23/TA9IN
P24(/ TB0IN), P25(/ TB1IN)
P26(/ TB2IN), P27(/ INT3/R TPTRG0)
P55/INT5/TB0IN/IDW
P56/INT6/TB1IN/IDV
P57/INT7/TB2IN/IDU
Data bus
Direction register
Port latch
[Inside dotted-line not included]
P13/TXD0, P17/TXD1
[Inside dotted-line included]
P2 0/TA4OUT, P22/TA9OUT
Data bus
Direction register
1
Port latch
Output (internal peripheral device)
P 60/TA0OUT/W/R TP00
P 61/TA0IN/V/R TP01
P 62/TA1OUT/U/R TP02
P 63/TA1IN/W/R TP03
P 64/TA2OUT/V/R TP10
P 65/TA2IN/U/R TP11
P 6O UTC UT
Reset
Data bus
Direction register
R
1
Port latch
Output (internal peripheral device)
P70/AN0, P71/AN1
P72/AN2
Data bus
Direction register
Port latch
Fig. 5.2.4 Port peripheral circuits (1)
Analog input
7906 Group User’s Manual Rev.2.0
5-5