參數(shù)資料
型號(hào)： Z86L7208FSC
廠(chǎng)商： ZILOG INC
元件分類(lèi)： 微控制器/微處理器
英文描述： IR MICROCONTROLLER
中文描述： 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44
封裝： QFP-44
文件頁(yè)數(shù)： 28/71頁(yè)
文件大小： 364K
代理商： Z86L7208FSC
Z86C72/C92/L72/L92
IR Microcontroller
Zilog
6-28
P R E L I M I N A R Y
DS97LVO0900
PIN FUNCTIONS
(Continued)
/RESET
(Input, active Low). Initializes the MCU. Reset is
accomplished either through Power-On, Watch-Dog Tim-
er, Stop-Mode Recovery, Low Voltage detection, or exter-
nal reset. During Power-On Reset and Watch-Dog Timer
Reset, the internally generated reset drives the reset pin
Low for the POR time. Any devices driving the reset line
should be open-drain in order to avoid damage from a pos-
sible conflict during reset conditions. Pull-up is provided in-
ternally. There is no internal condition that will not allow an
external reset to occur.
After the POR time, /RESET is a Schmitt-triggered input.
To avoid asynchronous and noisy reset problems, the
Z86L/CX2 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
Z86L/CX2 does not reset WDTMR, SMR, P2M, P2, P3, or
P3M registers on a Stop-Mode Recovery operation.
Figure 15. 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.
-
+
-
+
Pref1*
Comp1
Comp2
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