Z86D73 Datasheet, PDF (29/92 Pages) Zilog, Inc. – 40/44/48-Pin Low-Voltage IR OTP

Z86D73
40/44/48-Pin Low-Voltage IR OTP
23
Port 3 (P37–P31)
Port 3 is a 7-bit, CMOS-compatible fixed I/O port (see Figure 13). Port 3 consists
of three fixed input (P33–P31) and four fixed output (P37–P34), which can be con-
figured under software control for interrupt and as output from the counter/timers.
P31, P32, and P33 are standard CMOS inputs; P34, P35, P36, and P37 are push-
pull outputs.
Z86D73
OTP
Pref1
P31
P32
P33
P34
P35
P36
P37
Port 3 (I/O)
R247 = P3M
D1
1 = Analog
0 = Digital
P31 (AN1)
Pref
Dig.
+
Comp1
An.
-
P32 (AN2)
P33 (REF2)
+ ^Comp2
-
IRQ2, P31 Data Latch
IRQ0, P32 Data Latch
From Stop-Mode Recovery Source of SMR
Figure 13. Port 3 Configuration
IRQ1, P33 Data Latch
PS019402-1103
PRELIMINARY