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参数资料
| 型号： | P83C251SB16 |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | HIGH-PERFORMANCE CHMOS MICROCONTROLLER |
| 中文描述： | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PDIP40 |
| 封装： | PLASTIC, DIP-40 |
| 文件页数： | 12/35页 |
| 文件大小： | 186K |
| 代理商： | P83C251SB16 |
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12
PRELIMINARY
8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
V
PP
I
Programming Supply Voltage
. The programming supply voltage is
applied to this pin for programming the on-chip OTPROM/EPROM.
EA#
V
SS
V
SS
1
GND
Circuit Ground
. Connect this pin to ground.
—
GND
Secondary Ground
. This ground is provided to reduce ground bounce
and improve power supply bypassing. Connection of this pin to ground
is recommended. However, when using the 8XC251SA/SB/SP/SQ as
a pin-for-pin replacement for the 8XC51BH, V
can be unconnected
without loss of compatibility. (Not available on DIP)
—
V
SS
2
GND
Secondary Ground 2
. This ground is provided to reduce ground
bounce and improve power supply bypassing. Connection of this pin to
ground is recommended. However, when using the 8XC251SB as a
pin-for-pin replacement for the 8XC51FX, V
can be unconnected
without loss of compatibility. (Not available on DIP)
—
WAIT#
I
Real-time Wait State Input.
The real-time WAIT# input is enabled by
writing a logical ‘1’ to the WCON.0 (RTWE) bit at S:A7H. During bus
cycles, the external memory system can signal ‘system ready’ to the
microcontroller in real time by controlling the WAIT# input signal on the
port 1.6 input.
P1.6/CEX3
WCLK
O
Wait Clock Output.
The real-time WCLK output is driven at port 1.7
(WCLK) by writing a logical ‘1’ to the WCON.1 (RTWCE) bit at S:A7H.
When enabled, the WCLK output produces a square wave signal with
a period of one-half the oscillator frequency.
P1.7/CEX4/
A17
WR#
O
Write
. Write signal output to external memory.
P3.6
XTAL1
I
Input to the On-chip, Inverting, Oscillator Amplifier
. To use the
internal oscillator, a crystal/resonator circuit is connected to this pin. If
an external oscillator is used, its output is connected to this pin. XTAL1
is the clock source for internal timing.
—
XTAL2
O
Output of the On-chip, Inverting, Oscillator Amplifier
. To use the
internal oscillator, a crystal/resonator circuit is connected to this pin. If
an external oscillator is used, leave XTAL2 unconnected.
—
Table 6. Signal Descriptions (Continued)
Signal
Name
Type
Description
Alternate
Function
The descriptions of A15:8/P2.7:0 and AD7:0/P0.7:0 are for the nonpage-mode chip configuration (com-
patible with 44-pin PLCC and 40-pin DIP MCS 51 microcontrollers). If the chip is configured for page-
mode operation, port 0 carries the lower address bits (A7:0), and port 2 carries the upper address bits
(A15:8) and the data (D7:0).
相关PDF资料 |
PDF描述 |
|---|---|
| P83C251SP16 | HIGH-PERFORMANCE CHMOS MICROCONTROLLER |
| P83C251SQ16 | HIGH-PERFORMANCE CHMOS MICROCONTROLLER |
| P87C251SA16 | HIGH-PERFORMANCE CHMOS MICROCONTROLLER |
| P87C251SB16 | HIGH-PERFORMANCE CHMOS MICROCONTROLLER |
| P87C251SP16 | HIGH-PERFORMANCE CHMOS MICROCONTROLLER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| P83C251SP16 | 制造商:INTEL 制造商全称:Intel Corporation 功能描述:HIGH-PERFORMANCE CHMOS MICROCONTROLLER |
| P83C251SQ16 | 制造商:INTEL 制造商全称:Intel Corporation 功能描述:HIGH-PERFORMANCE CHMOS MICROCONTROLLER |
| P83C251TB24 R OM | 制造商:Intel 功能描述: |
| P83C266 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Microcontrollers for PAL/SECAM TV with OSD and VST |
| P83C266BDR | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Microcontrollers for PAL/SECAM TV with OSD and VST |
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