T83C5101_03 查看數據表（PDF） - Atmel Corporation
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T83C5101_03 Datasheet PDF : 58 Pages
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T8xC5101/02
T8xC5101/02 Pin Configuration
P3.4/T0 1
P3.3/INT1 2
P3.2/INT0 3
P3.1 4
P3.0 5
VPP 6
P4.0/Prog 7
P4.1/Test 8
RST 9
XTAL2 10
XTAL1 11
Vss 12
24
23
22
21
DIL24 20
19
SO24 18
17
SSOP24* 16
15
14
13
Vcc
P3.5/T1
P3.6
P3.7
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1/T2EX
P1.0/T2
* Check for availability
P3.4/T0 1
P3.3/INT1 2
P3.2/INT0 3
P3.1 4
P3.0 5
VPP 6
P4.3 7
P4.0/Prog 8
P4.1/Test 9
RST 10
XTAL2 11
XTAL1 12
P4.4 13
Vss 14
28 Vcc
27 P4.2
26 P3.5/T1
25 P3.6
24 P3.7
23 P1.7
SO28* 22 P1.6
21 P4.5
20 P1.5
19 P1.4
18 P1.3
17 P1.2
16 P1.1/T2EX
15 P1.0/T2
* Check for availability
Mnemonic
VSS
VCC
P1.0-P1.7
Pin Number
28
24 pins pins
12
14
24
28
13-20
15-20
22-23
P4.0 (Prog)-P4.1
7
8
(Test)
8
9
P4.2-P4.5
P3.0-P3.7
NA
5-1
23-21
27
7
13
21
5-1
26-24
5
5
4
4
3
3
2
2
Type
I
I
I/O
I/O
I
O (I)
O (I)
Name and Function
Ground: 0V reference
Power Supply: This is the power supply voltage for normal, idle and power-down operation
Port 1: 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-ups and can be used as inputs. As inputs, Port
1 pins that are externally pulled low will source current because of the internal pull-ups. Port 1
also receives the low-order address byte during memory programming and verification.
Alternate functions for Port 1 include:
T2 (P1.0): Timer/Counter 2 external count input/Clockout
T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction Control
Port 4 bits 0 & 1: Except during programming and verifying, these two bits are output port driving
30 micro Amps at high level and sinking 10 mA at low level (Vol < 1V). If they have 1s written to
them, they output a high level and if they have 0 written to them, they output a low level. These 2
pins cannot be used as inputs. Users should take care to never externally drive these pins
low, especially during reset. These two pins are primarily designed to drive LEDs.
During programming and verifying, these two pins are used as input, as explained in the
corresponding chapter.
A Read or a Read/Modify/Write instruction to these bits will read the status of the output: 1 if the
output is 1, 0 if the output is 0.
Port 4 bits 2 to 5: bidirectional I/O port with internal pull-ups. Port 4.2 to 4.5 pins that have 1s
I/O written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port
4.2 to 4.5 pins that are externally pulled low will source current because of the internal pull-ups.
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-ups and can be used as inputs. As inputs, Port
3 pins that are externally pulled low will source current because of the internal pull-ups. Port 3
also serves the special features of the 80C51 family, as listed below.
I
RxD (P3.0): Serial input port
O TxD (P3.1): Serial output port
I
INT0 (P3.2): External interrupt 0
I
INT1 (P3.3): External interrupt 1
5
4233G–8051–03/03
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