IS82C54 Intersil, IS82C54 Datasheet - Page 8
![IC PERIPH UART/BRG 8MHZ 28-PLCC](/photos/6/57/65763/20-28-plcc_sml.jpg)
IS82C54
Manufacturer Part Number
IS82C54
Description
IC PERIPH UART/BRG 8MHZ 28-PLCC
Manufacturer
Intersil
Type
Programmable Timerr
Datasheet
1.CS82C54Z96.pdf
(22 pages)
Specifications of IS82C54
Frequency
8MHz
Voltage - Supply
4.5 V ~ 5.5 V
Current - Supply
10mA
Operating Temperature
-40°C ~ 85°C
Package / Case
28-PLCC
Peak Reflow Compatible (260 C)
No
Leaded Process Compatible
No
Rohs Compliant
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Count
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
IS82C54
Manufacturer:
HARRIS
Quantity:
63
Company:
Part Number:
IS82C54-10
Manufacturer:
HARRIS
Quantity:
40
Part Number:
IS82C54-10
Manufacturer:
INTERSIL
Quantity:
20 000
Company:
Part Number:
IS82C54-10Z
Manufacturer:
Intersil
Quantity:
2 317
Since the Control Word Register and the three Counters have
separate addresses (selected by the A1, A0 inputs), and each
Control Word specifies the Counter it applies to (SC0, SC1
bits), no special instruction sequence is required. Any
programming sequence that follows the conventions above is
acceptable.
CONTROL WORD FORMAT
A1, A0 = 11; CS = 0; RD = 1; WR = 0
NOTE: Don’t Care bits (X) should be 0 to insure compatibility with
future products.
RW1 RW0
SC1
M2
D7
0
0
1
1
SC1
X
X
0
0
1
1
0
0
1
1
0
1
0
1
0
1
M1
SC0
0
0
1
1
0
0
Binary Counter 16-bit
Binary Coded Decimal (BCD) Counter (4 Decades)
D6
SC0
Counter Latch Command (See Read Operations)
Read/Write least significant byte only.
Read/Write most significant byte only.
Read/Write least significant byte first, then most
significant byte.
0
1
0
1
BCD - BINARY CODED DECIMAL
M0
0
1
0
1
0
1
RW1
D5
Select Counter 0
Select Counter 1
Select Counter 2
Read-Back Command (See Read Operations)
SC - SELECT COUNTER
Mode 0
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
RW - READ/WRITE
RW0
D4
M - MODE
8
M2
D3
M1
D2
M0
D1
BCD
D0
82C54
Control Word - Counter 0
LSB of Count - Counter 0
MSB of Count - Counter 0
Control Word - Counter 1
LSB of Count - Counter 1
MSB of Count - Counter 1
Control Word - Counter 2
LSB of Count - Counter 2
MSB of Count - Counter 2
Control Word - Counter 0
Control Word - Counter 1
Control Word - Counter 2
LSB of Count - Counter 2
LSB of Count - Counter 1
LSB of Count - Counter 0
MSB of Count - Counter 0
MSB of Count - Counter 1
MSB of Count - Counter 2
Control Word - Counter 2
Control Word - Counter 1
Control Word - Counter 0
LSB of Count - Counter 2
MSB of Count - Counter 2
LSB of Count - Counter 1
MSB of Count - Counter 1
LSB of Count - Counter 0
MSB of Count - Counter 0
POSSIBLE PROGRAMMING SEQUENCE
POSSIBLE PROGRAMMING SEQUENCE
POSSIBLE PROGRAMMING SEQUENCE
A1
A1
A1
1
0
0
1
0
0
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
1
1
0
0
0
0
A0
A0
A0
1
0
0
1
1
1
1
0
0
1
1
1
0
1
0
0
1
0
1
1
1
0
0
1
1
0
0