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| 型號(hào)： | HMS99C58S |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8-BIT SINGLE-CHIP MICROCONTROLLERS WITH EMBEDDED FLASH |
| 中文描述： | 8位單片機(jī)與嵌入式閃存微控制器 |
| 文件頁(yè)數(shù)： | 12/73頁(yè) |
| 文件大小： | 696K |
| 代理商： | HMS99C58S |
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HMS99C51S/52S/54S/56S/58S
8
Sep. 2004 Ver 1.01
PIN DEFINITIONS AND FUNCTIONS
Symbol
Pin Number
Input/
Output
Function
PLCC-
44
PDIP-
40
MQFP-
44
P1.0-P1.7
2-9
2
3
1-8
1
2
40-44,
1-3
40
41
I/O
Port1
Port 1 is an 8-bit bidirectional I/O port with internal
pull-ups. Port 1 pins that have 1s written to them are
pulled high by the internal pull-up resistors and can be
used as inputs. As inputs, port 1 pins that are
externally pulled low will source current because of
the pulls-ups (I
IL
, in the DC characteristics). Port1 also
serves alternate functions of Timer 2 as follows.
P1.0 / T2, Clock Out : Timer/counter 2 external count
input, Clock Out
P1.1 / T2EX :Timer/counter 2 trigger input
Port1 receives the low-order address bytes during
Flash programming and verifying.
P3.0-P3.7
11,
13-19
10-17
5, 7-13
I/O
Port 3
Port 3 is an 8-bit bidirectional I/O port with internal
pull-ups. Port 3 pins that have 1s written to them are
pulled high by the internal pull-up resistors and can be
used as inputs. As inputs, port 3 pins that are
externally pulled low will source current because of
the pulls-ups (I
IL
, in the DC characteristics). Port 3 also
serves the special features of the 80C51 family, as
listed below.
11
13
14
15
16
17
18
19
10
11
12
13
14
15
16
17
5
7
8
9
10
11
12
13
P3.0 / RxD
P3.1 / TxD
P3.2 /INT0
P3.3 / INT1
P3.4 /T0
P3.5 /T1
P3.6 / WR
P3.7 /RD
receiver data input (asynchronous) or
data input/output(synchronous) of serial
interface 0
transmitter data output (asynchronous)
or clock output (synchronous) of the
serial interface 0
interrupt 0 input/timer 0 gate control
interrupt 1 input/timer 1 gate control
counter 0 input
counter 1 input
the write control signal latches the data
byte from port 0 into the external data
memory
the read control signal enables the
external data memory to port 0
XTAL2
20
18
14
O
XTAL2
Output of the inverting oscillator amplifier.
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|---|---|
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