AT73C502 ATMEL Corporation, AT73C502 Datasheet - Page 5

• Manufacturer Part Number: AT73C502
• Description: Chip Set Solution for Watt-Hour Meters
• Manufacturer: ATMEL Corporation

AT73C500 DSP
Figure 5. PLCC-44 package pin layout
Supply
Status/
Digital
Inputs
Power
XRES
Mode
GND
IRQ0
IRQ1
Pins
VCC
CLK
Bus
B15
B14
B13
B12
B11
B10
B9
B8
GND
GND
GND
GND
B12
B13
B14
B15
B0
B1
B2
7
8
9
10
11
12
13
14
15
16
17
20, 27, 30,
11, 12,16,
1, 2, 6, 7,
GND
18
B3
6
35, 42
Pin
Pin
Pin
34
44
38
31
17
15
14
13
29
28
26
25
SOUT1
3
19
B4
5
SOUT0
GND
20
4
IRQ0 /
PFAIL
21
B5
3
PWR
PWR
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
GND
I
I
I
I
22
B6
2
GND
23
B7
1
Description
Digital Supply, Positive, +5V
Digital Supply, Negative, 0V
Description
Clock Input
Reset Input, active low
Interrupt Input, usually
connected to PFAIL output
of AT73C501
Interrupt Input, connected to
ACK Output of AT73C501
Description
Status/Mode Bus, Bit7
Status/Mode Bus, Bit6
Status/Mode Bus, Bit5
Status/Mode Bus, Bit4
Status/Mode Bus, Bit3
Status/Mode Bus, Bit2
Status/Mode Bus, Bit1
Status/Mode Bus, Bit0
CLK
N/C
44
24
STROBE
43
25
B8
VCC
42
26
B9
ADDR2
GND
41
27
ADDR1
B10
40
28
39
38
37
36
35
34
33
32
31
30
29
ADDR0
XRES
BRDY
RD/WR
VCC
GND
SIN
SCLK
IRQ1 / ACK
GND
B11
Microprocessor
Control Signals
AT73C502 and
of P Bus and
Status/Mode
AT73C501 /
EEPROM
Interface
STROBE
SOUT0
SOUT1
ADDR1
ADDR0
RD/WR
BRDY
SCLK
Bus
Bus
SIN
B7
B6
B5
B4
B3
B2
B1
B0
Pin
23
22
21
19
18
10
9
8
Pin
Pin
33
32
43
37
40
39
36
4
5
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
O
O
O
I
I
I
Description
Description
Serial Output, used as a
clock for EEPROM
Serial Output, used as Chip
Select (CS) for AT73C501
and as Data Input (DI) for
EEPROM
Serial Data Input, data from
AT73C501 or from EEPROM
Serial Clock Input, bit clock
from AT73C501
Description
Strobe Output
Microprocessor ready for
I/O, Active Low
Address Output 1, used for
Address Output 0, used for
Status/ Mode bus and for
Impulse Outputs
Read/Write Signal
P Bus, Bit7
P Bus, Bit6
P Bus, Bit5
P Bus, Bit4
P Bus, Bit3
P Bus, Bit2
P Bus, Bit1
P Bus, Bit0
P bus
5