Document Number: 38-10001 Rev. *J Page 6 of 19
Pin Descriptions
Pin Name I/O Pin Function
CY7C53150
TQFP-64 Pin No.
CY7C53120xx
SOIC-32 Pin No.
CY7C53120xx
TQFP-44 Pin No.
CLK1 Input Oscillator connection or external clock
input.
24 15 15
CLK2 Output Oscillator connection. Leave open when
external clock is input to CLK1. Maximum
of one external load.
23 14 14
RESET
I/O (Built-In
Pull up)
Reset pin (active LOW). Note The
allowable external capacitance connected
to the RESET pin is 100–1000 pF.
6140
SERVICE I/O (Built-In
Configurable
Pull up)
Service pin (active LOW). Alternates
between input and output at a 76-Hz rate.
17 8 5
I/O0–I/O3 I/O Large current-sink capacity (20 mA).
General I/O port. The output of timer/
counter 1 may be routed to I/O0. The
output of Timer/Counter 2 may be routed
to I/O1.
2, 3, 4, 5 7, 6, 5, 4 4, 3, 2, 43
I/O4–I/O7 I/O (Built-In
Configurable
Pull ups)
General I/O port. The input to
Timer/Counter 1 may be derived from one
of I/O4–I/O7. The input to Timer/Counter 2
may be derived from I/O4.
10, 11, 12, 13 3, 30, 29, 28 42, 36, 35, 32
I/O8–I/O1
0
I/O General I/O port. May be used for serial
communication under firmware control.
14, 15, 16 27, 26, 24 31, 30, 27
D0–D7 I/O Bidirectional memory data bus. 43, 42, 38, 37,
36, 35, 34, 33
N/A N/A
R/W
Output Read/write control output for external
memory.
45 N/A N/A
E
Output Enable clock control output for external
memory.
46 N/A N/A
A0–A15 Output Memory address output port. 64, 63, 62, 61, 60,
59, 58, 57, 56, 55,
54, 53, 52, 51, 50,
47
N/A N/A
V
DD
Input Power input (5 V nom). All V
DD
pins must
be connected together externally.
7, 20, 22, 26,
40, 41, 44
2, 11, 12,
18, 25, 32
9, 10, 19,
29, 38, 41
V
SS
Input Power input (0 V, GND). All V
SS
pins must
be connected together externally.
8,19, 21, 25, 39 9, 13, 16, 23, 31 7,13, 16, 26, 37
Vpp Input In-circuit test mode control. If Vpp is high
when RESET is asserted, the I/O, address
and data buses become Hi-Z.
9108
CP0–CP4 Communication
Network
Interface
Bidirectional port supporting communi-
cations in three modes.
28, 29, 30, 31, 32 19, 20, 17, 21, 22 20, 21, 18, 24, 25
NC — No connect. Must not be connected on the
user’s PC board, since they may be
connected internal to the chip.
1, 18, 27, 48, 49 N/A 1, 6, 11, 12, 17,
22, 23, 28, 33, 34,
39, 44
