CY7C53120 CYPRESS [Cypress Semiconductor], CY7C53120 Datasheet - Page 4

• Manufacturer Part Number: CY7C53120
• Description: Neuron Chip Network Processor
• Manufacturer: CYPRESS [Cypress Semiconductor]

Document #: 38-10001 Rev. *D
Pin Descriptions
Memory Usage
All Neuron chips require system firmware to be present when
they are powered up. In the case of the CY7C53120 family,
this firmware is preprogrammed in the factory in an on-chip
ROM. In the case of the CY7C53150, the system firmware
must be present in the first 16 KB of an off-chip nonvolatile
memory such as Flash, EPROM, EEPROM, or NVRAM.
These devices must be programmed in a device programmer
Pin Name
CLK1
CLK2
RESET
SERVICE
IO0–IO3
IO4–IO7
IO8–IO10
D0–D7
R/W
E
A0–A15
V
V
Vpp
CP0–CP4 Communication
NC
DD
SS
Configurable
Configurable
I/O (Built-In
I/O (Built-In
I/O (Built-In
Pull-ups)
Interface
Network
Pull-up)
Pull-up)
Output
Output
Output
Output
Input
Input
Input
Input
I/O
I/O
I/O
I/O
—
Oscillator connection or external clock
input.
Oscillator connection. Leave open when
external clock is input to CLK1. Maximum
of one external load.
Reset pin (active LOW). Note. The
allowable external capacitance connected
to the RESET pin is 100 –1000 pF.
Service pin (active LOW). Alternates
between input and output at a 76-Hz rate.
Large current-sink capacity (20 mA).
General I/O port. The output of timer/
counter 1 may be routed to IO0. The output
of timer/counter 2 may be routed to IO1.
General I/O port. The input to
timer/counter 1 may be derived from one of
IO4–IO7. The input to timer/counter 2 may
be derived from IO4.
General I/O port. May be used for serial
communication under firmware control.
Bidirectional memory data bus.
Read/write control output for external
memory.
Enable clock control output for external
memory.
Memory address output port.
Power input (5V nom). All V
be connected together externally.
Power input (0V, GND). All V
be connected together externally.
In-circuit test mode control. If Vpp is high
when RESET is asserted, the I/O, address
and data buses become Hi-Z.
Bidirectional port supporting communi-
cations in three modes.
No connect. Must not be connected on the
user’s PC board, since they may be
connected internal to the chip.
Pin Function
DD
SS
pins must
pins must
before board assembly. Because the system firmware imple-
ments the network protocol, it cannot itself be downloaded
over the network.
For the CY7C53120 family, the user application program is
stored in on-chip Flash memory. It may be programmed using
a device programmer before board assembly, or may be
TQFP-64 Pin No.
64, 63, 62, 61, 60,
59, 58, 57, 56, 55,
54, 53, 52, 51, 50,
28, 29, 30, 31, 32 19, 20, 17, 21, 22 20, 21, 18, 24, 25
1, 18, 27, 48, 49
8,19, 21, 25, 39 9, 13, 16, 23, 31
43, 42, 38, 37,
36, 35, 34, 33
10, 11, 12, 13
7, 20, 22, 26,
CY7C53150
14, 15, 16
40, 41, 44
2, 3, 4, 5
24
23
17
45
46
47
6
9
SOIC-32 Pin No.
CY7C53120xx
3, 30, 29, 28
27, 26, 24
18, 25, 32
2, 11, 12,
7, 6, 5, 4
N/A
N/A
N/A
N/A
N/A
15
14
10
1
8
CY7C53150
CY7C53120
TQFP-44 Pin No.
22, 23, 28, 33, 34,
7,13, 16, 26, 37
1, 6, 11, 12, 17,
CY7C53120xx
42, 36, 35, 32
4, 3, 2, 43
31, 30, 27
29, 38, 41
9, 10, 19,
Page 4 of 12
39, 44
N/A
N/A
N/A
N/A
15
14
40
5
8