tc7211am ETC-unknow, tc7211am Datasheet - Page 7

• Manufacturer Part Number: tc7211am
• Description: Compatible 4-digit Cmos Decoder/driver
• Manufacturer: ETC-unknow

BUS COMPATIBLE, 4-DIGIT
CMOS DECODER/DRIVER
portion duration is less than 1 sec. The backplane disable
sensing circuit will not respond to such a short signal.
Input Configuration and Output Codes
level = logic “1”) input at pin 27 (LSB) through pin 30 (MSB).
The binary input is decoded to the 7-segment output known
as Code B. The output display format is 0 to 9, —, E, H, L,
P and blank display (see Table 1). Segment assignments
are shown in Figure 4. The TC7211AM will correctly decode
binary and BCD true codes to a 7-segment output.
and display data under microprocessor control. Four data
inputs (pins 27–30) and two digit select input bits (pins 31
and 32) are written into input buffer latches. The rising edge
of either chip select causes data to be latched, decoded and
stored in the selected digit output data latch. The 2-bit digit
code selects the appropriate output digit latch. The 4-bit
display data word is decoded to the "Code B" 7-segment
output format.
refer to the TC7211AM (LCD) 4-digit decoder driver data
sheet. This device is designed to accept multiplexed BCD/
binary input data for display under the control of four sepa-
rate digit select control signals.
BCD/BINARY
SELECT
SELECT
+ 5V
DIGIT
The TC7211AM accepts a 4-bit, true binary (positive
The TC7211AM is designed to interface with a data bus
For applications where bus compatibility is not required,
CHIP
TELCOM SEMICONDUCTOR, INC.
DATA
GND
OSC
V +
Figure 3. TC7211AM Driving an 8-Digit LCD Display
8-DIGIT
4
BACKPLANE
B3–
B0 CS1
LCD
4
SLAVE
in Master/Slave Configuration
HIGH ORDER
CS2
SEGMENTS
D8 D7 D6 D5 D4 D3 D2 D1
DS1
DS2
28
BP
+ 5V
BACKPLANE
GND
OSC
V +
MASTER
HIGH ORDER
SEGMENTS
B3–
B0
4
28
CS1
BACKPLANE
CS2
DS1
DS2
TC7211AM
BP
Table 1. Binary Codes Versus Character Displayed
Special Order Decoder Option
combinations of 7-segment output codes. For large volume
orders (50K pieces minimum), custom decoder options are
available. Contact TelCom Semiconductor for details.
The TC7211AM is mask programmed to give the 16
B3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Binary Input
B2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Figure 4. Segment Assignment
B1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
E
F
B0
D
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
G
A
C
B
Character Displayed
TC7211AM
(Code B)
Blank
—
H
0
1
2
3
4
5
6
7
8
9
E
L
P
6-13
1
2
3
4
5
6
7
8