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參數(shù)資料
| 型號： | L8708H |
| 廠商： | ZiLOG, Inc. |
| 英文描述： | IR/Low-Voltage Microcontroller |
| 中文描述： | 紅外/低電壓微控制器 |
| 文件頁數(shù)： | 24/66頁 |
| 文件大小： | 599K |
| 代理商： | L8708H |
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Z86L88/81/86/87/89/73
IR/Low-Voltage Microcontroller
24
P R E L I M I N A R Y
DS96LV00800
PIN FUNCTIONS
(Continued)
After the POR time, /RESET is a Schmitt-triggered input.
To avoid asynchronous and noisy reset problems, the
Z86LXX is equipped with a reset filter of four external
clocks (4TpC). If the external reset signal is less than 4TpC
in duration, no reset occurs. On the fifth clock after the re-
set is detected, an internal RST signal is latched and held
for an internal register count of 18 external clocks, or for
the duration of the external reset, whichever is longer.
During the reset cycle, /DS is held active Low while /AS cy-
cles at a rate of TpC/2. Program execution begins at loca-
tion 000CH, 5-10 TpC cycles after the RST is released. For
Power-On Reset, the typical reset output time is 5 ms. The
Z86LXX does not reset WDTMR, SMR, P2M, or P3M reg-
isters on a Stop-Mode Recovery operation. The output
states of Port3 and Port2 are also un-affected by a Stop-
Mode recovery.
Figure 17. Port 3 Configuration
Port 3
(I/O or Handshake)
Z86L7X
MCU
Pref1
P31
P32
P33
P34
P35
P36
P37
Note:
P31, 32, 33 have a 200 K
mask option
200 K
Mask
Option
D1
R247 = P3M
P31 (AN1)
P32 (AN2)
P33 (REF2)
From Stop-Mode
Recovery Source of SMR
1 = Analog
0 = Digital
IRQ2, P31 Data Latch
IRQ0, P32 Data Latch
IRQ1, P33 Data Latch
DIG.
AN.
-
+
-
+
Pref
Comp1
Comp2
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