N80C251TB24 Datasheet, PDF (11/36 Pages) Intel Corporation – TQHIGH-PERFORMANCE CHMOS MICROCONTROLLER

8xC251TB/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
P1.0 / T2
1
P1.1 / T2EX
2
P1.2 / ECI / RXD1
3
P1.3 / CEX0 / TXD1
4
P1.4 / CEX1
5
P1.5 / CEX2
6
P1.6 / CEX3 / WAIT#
7
P1.7 / CEX4 / A17 / WCLK
8
RST
9
P3.0 / RXD
10
P3.1 / TXD
11
P3.2 / INT0#
12
P3.3 / INT1#
13
P3.4 / T0
14
P3.5 / T1
15
P3.6 / WR#
16
P3.7 / RD# / A16
17
XTAL2
18
XTAL1
19
V_SS
20
8XC251TB
8XC251TQ
View of
component
as mounted
on PC board
40
V_CC
39
AD0 / P0.0
38
AD1 / P0.1
37
AD2 / P0.2
36
AD3 / P0.3
35
AD4 / P0.4
34
AD5 / P0.5
33
AD6 / P0.6
32
AD7 / P0.7
31
EA#
30
ALE
29
PSEN#
28
A15 / P2.7
27
A14 / P2.6
26
A13 / P2.5
25
A12 / P2.4
24
A11 / P2.3
23
A10 / P2.2
22
A9 / P2.1
21
A8 / P2.0
Figure 4. 8xC251TB/TQ 40-pin PDIP Packages
B2978-01
5