Z86E7216PSC View Datasheet(PDF) - Zilog
Part Name
Description
MFG CO.
'Z86E7216PSC' PDF : 74 Pages View PDF
Z86E72/E73
OTP IR Microcontrollers
Port 3 (P37-P31). Port 3 is a 7-bit, CMOS compatible three ter bits 6 and 7). Pref1 and P33 are the comparator refer-
fixed input and four fixed output port. Port 3 consists of ence voltage inputs. Access to the Counter Timer edge de-
1 three fixed input (P33-P31) and four fixed output (P37- tection circuit is through P31 or P20 (see CTR1
P34), and can be configured under software control for In- description).
put/Output, Interrupt, Port handshake, Data Memory func-
tions and output from the counter/timers. P31, P32, and Port 3 provides the following control functions: handshake
P33 are standard CMOS inputs; outputs are push-pull.
for Ports 0, 1, and 2 (/DAV and RDY); three external inter-
rupt request signals (IRQ2-IRQ0); Data Memory Select
Two on-board comparators process analog signals on P31 (/DM) (Table 8).
and P32 with reference to the voltage on Pref1 and P33.
The analog function is enabled by programming the Port 3 Port 3 also provides output for each of the counter/timers
Mode Register (bit 1). P31 and P32 are programmable as and the AND/OR Logic. Control is performed by program-
rising, falling, or both edge triggered interrupts (IRQ regis- ming bits D5-D4 of CTRI, bit 0 of CTR0 and bit 0 of CTR2.
P34 OUT
P31
+ COMP1
-
PREF1
Counter/Timer
T8
P34 OUT
P34
PAD
CTR0
D0
0 Normal Control
1 8-bit Timer output active
P37 OUT
P32
+ COMP2
-
P33 (PREF2)
PCON
D0
0 = P34, P37 Standard Output *
1 = P34, P37 Comparator Output
* Reset condition.
P37
PAD
Figure 17. Port 3 Configuration
DS96LVO1100
PRELIMINARY
1-23
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