AT89S8253-24SC View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
AT89S8253-24SC Datasheet PDF : 59 Pages
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2.3 44J – 44-lead PLCC
(MOSI) P1.5 7
(MISO) P1.6 8
(SCK) P1.7 9
RST 10
(RXD) P3.0 11
NC 12
(TXD) P3.1 13
(INT0) P3.2 14
(INT1) P3.3 15
(T0) P3.4 16
(T1) P3.5 17
39 P0.4 (AD4)
38 P0.5 (AD5)
37 P0.6 (AD6)
36 P0.7 (AD7)
35 EA/VPP
34 NC
33 ALE/PROG
32 PSEN
31 P2.7 (A15)
30 P2.6 (A14)
29 P2.5 (A13)
AT89S8253
2.4 42PS6 – PDIP
RST 1
(RXD) P3.0 2
(TXD) P3.1 3
(INT0) P3.2 4
(INT1) P3.3 5
(T0) P3.4 6
(T1) P3.5 7
(WR) P3.6 8
(RD) P3.7 9
XTAL2 10
XTAL1 11
GND 12
PWRGND 13
(A8) P2.0 14
(A9) P2.1 15
(A10) P2.2 16
(A11) P2.3 17
(A12) P2.4 18
(A13) P2.5 19
(A14) P2.6 20
(A15) P2.7 21
42 P1.7 (SCK)
41 P1.6 (MISO)
40 P1.5 (MOSI)
39 P1.4 (SS)
38 P1.3
37 P1.2
36 P1.1 (T2EX)
35 P1.0 (T2)
34 VDD
33 PWRVDD
32 P0.0 (AD0)
31 P0.1 (AD1)
30 P0.2 (AD2)
29 P0.3 (AD3)
28 P0.4 (AD4)
27 P0.5 (AD5)
26 P0.6 (AD6)
25 P0.7 (AD7)
24 EA/VPP
23 ALE/PROG
22 PSEN
3. Pin Description
3.1 VCC
Supply voltage (all packages except 42-PDIP).
3.2 GND
Ground (all packages except 42-PDIP; for 42-PDIP GND connects only the logic core and the
embedded program/data memories).
3.3 VDD
Supply voltage for the 42-PDIP which connects only the logic core and the embedded pro-
gram/data memories.
3.4 PWRVDD
3286H–MICRO–9/05
Supply voltage for the 42-PDIP which connects only the I/O Pad Drivers.
The application board must connect both VDD and PWRVDD to the board supply voltage.
3
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