參數(shù)資料
型號(hào)： SB83C196NP
廠商： INTEL CORP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP100
封裝： SQFP-100
文件頁(yè)數(shù)： 7/33頁(yè)
文件大?。?/td> 1159K
代理商： SB83C196NP
15
8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
RESET#
I/O
Reset
A level-sensitive reset input to and open-drain system reset output
from the microcontroller. Either a falling edge on RESET# or an
internal reset turns on a pull-down transistor connected to the
RESET# pin for 16 state times. In the powerdown, standby, and idle
modes, asserting RESET# causes the chip to reset and return to
normal operating mode. After a device reset, the first instruction
fetch is from FF2080H (or F2080H in external memory). For the
80C196NP, the program and special-purpose memory locations
(FF2000–FF2FFFH) reside in external memory. For the 83C196NP,
these locations can reside either in external memory or in internal
ROM.
—
RPD
I
Return from Powerdown
Timing pin for the return-from-powerdown circuit.
If your application uses powerdown mode, connect a capacitor
between RPD and V
SS if the internal oscillator is the clock source.
The capacitor causes a delay that enables the oscillator to stabilize
before the internal CPU and peripheral clocks are enabled.
The capacitor is not required if your application uses powerdown
mode and if an external clock input is the clock source.
If your application does not use powerdown mode, leave this pin
unconnected.
—
RXD
I/O
Receive Serial Data
In modes 1, 2, and 3, RXD receives serial port input data. In mode
0, it functions as either an input or an open-drain output for data.
P2.1
T1CLK
I
Timer 1 External Clock
External clock for timer 1. Timer 1 increments (or decrements) on
both rising and falling edges of T1CLK. Also used in conjunction
with T1DIR for quadrature counting mode.
and
External clock for the serial I/O baud-rate generator input (program
selectable).
P1.4
T2CLK
I
Timer 2 External Clock
External clock for timer 2. Timer 2 increments (or decrements) on
both rising and falling edges of T2CLK. Also used in conjunction
with T2DIR for quadrature counting mode.
P1.6
T1DIR
I
Timer 1 External Direction
External direction (up/down) for timer 1. Timer 1 increments when
T1DIR is high and decrements when it is low. Also used in conjunc-
tion with T1CLK for quadrature counting mode.
P1.5
T2DIR
I
Timer 2 External Direction
External direction (up/down) for timer 2. Timer 2 increments when
T2DIR is high and decrements when it is low. Also used in conjunc-
tion with T2CLK for quadrature counting mode.
P1.7
TXD
O
Transmit Serial Data
In serial I/O modes 1, 2, and 3, TXD is used to transmit serial port
data. In mode 0, it is used as the serial clock output.
P2.0
Table 8. Pin Descriptions (Continued)
Name
Type
Description
Multiplexed
with
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