N80C251TB24 Intel, N80C251TB24 Datasheet - Page 13

• Manufacturer Part Number: N80C251TB24
• Description: IC MPU 8-BIT 5V 24MHZ 44-PLCC
• Manufacturer: Intel
• Series: 80Cr

Specifications of N80C251TB24

• Rohs Status: RoHS non-compliant
• Core Processor: MCS 251
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SIO
• Peripherals: PWM, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: 816721

AD0/P0.0
AD1/P0.1
AD2/P0.2
AD3/P0.3
AD4/P0.4
AD5/P0.5
AD6/P0.6
AD7/P0.7
A8/P2.0
A9/P2.1
A10/P2.2
A11/P2.3
A12/P2.4
A13/P2.5
A14/P2.6
A15/P2.7
P3.7/RD#/A16
P1.7/CEX4/A17/WCLK
P3.2/INT0#
P3.3/INT1#
EA#
RST
XTAL1
XTAL2
Table 5. 8xC251TB/TQ PLCC/DIP Pin Assignments Arranged by Functional Category
Name
Name
Processor Control
Address & Data
PLCC
PLCC
43
42
41
40
39
38
37
36
24
25
26
27
28
29
30
31
19
14
15
35
10
21
20
9
8xC251TB/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
DIP
DIP
39
38
37
36
35
34
33
32
21
22
23
24
25
26
27
28
17
12
13
31
18
19
8
9
P1.0/T2
P1.1/T2EX
P1.2/ECI/RXD1
P1.3/CEX0/TXD1
P1.4/CEX1
P1.5/CEX2
P1.6/CEX3/WAIT#
P1.7/CEX4/A17/WCLK
P3.0/RXD
P3.1/TXD
P3.4/T0
P3.5/T1
V
V
V
V
V
EA#
P3.6/WR#
P3.7/RD#/A16
ALE
PSEN#
CC
CC2
SS
SS1
SS2
Name
Name
Name
Bus Control & Status
Power & Ground
Input/Output
PLCC
PLCC
23, 34
PLCC
11
13
16
17
44
12
22
35
18
19
33
32
2
3
4
5
6
7
8
9
1
DIP
DIP
DIP
10
11
14
15
40
20
31
16
17
30
29
1
2
3
4
5
6
7
8
7