參數(shù)資料
型號(hào): Z86E73
廠商: ZiLOG, Inc.
英文描述: OTP IR Microcontroller(一次可編程紅外線微控制器)
中文描述: 檢察官辦公室紅外微控制器(一次可編程紅外線微控制器)
文件頁(yè)數(shù): 23/75頁(yè)
文件大?。?/td> 394K
代理商: Z86E73
Z86E72/73
Zilog
OTP IR Microcontroller
DS97LVO1100
P R E L I M I N A R Y
23
1
Port 3
(P37-P31). Port 3 is a 7-bit, CMOS-compatible
three fixed input and four fixed output port. Port 3 consists
of three fixed input (P33-P31) and four fixed output (P37-
P34), and can be configured under software control for In-
put/Output, Interrupt, Port handshake, Data Memory func-
tions and output from the counter/timers. P31, P32, and
P33 are standard CMOS inputs; outputs are push-pull.
Two on-board comparators process analog signals on P31
and P32 with reference to the voltage on Pref1 and P33.
The analog function is enabled by programming the Port 3
Mode Register (bit 1). P31 and P32 are programmable as
rising, falling, or both edge triggered interrupts (IRQ regis-
ter bits 6 and 7). Pref1 and P33 are the comparator refer-
ence voltage inputs. Access to the Counter Timer edge de-
tection circuit is through P31 or P20 (see CTR1
description).
Port 3 provides the following control functions: handshake
for Ports 0, 1, and 2 (/DAV and RDY); three external inter-
rupt request signals (IRQ2-IRQ0); Data Memory Select
(/DM) (Table 8).
Port 3 also provides output for each of the counter/timers
and the AND/OR Logic. Control is performed by program-
ming bits D5-D4 of CTRI, bit 0 of CTR0 and bit 0 of CTR2.
Figure 17. Port 3 Configuration
P34 OUT
P37 OUT
P32
+
-
P33 (PREF2)
0 = P34, P37 Standard Output
1 = P34, P37 Comparator Output
PCON
D0
P31
+
-
PREF1
P37
PAD
P34
PAD
*
T8
P34 OUT
0 Normal Control
1 8-bit Timer output active
CTR0
D0
Counter/Timer
Reset condition.
*
COMP2
COMP1
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