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參數(shù)資料
| 型號(hào)： | TC7211AMIPL |
| 廠商： | TelCom Semiconductor, Inc. |
| 英文描述： | BUS COMPATIBLE 4-DIGIT CMOS DECODER/DRIVER |
| 中文描述： | 總線兼容4位的CMOS譯碼器/驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 7/7頁(yè) |
| 文件大?。?/td> | 88K |
| 代理商： | TC7211AMIPL |
6-13
TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
Binary Input
B2
Character Displayed
(Code B)
B3
B1
B0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
3
4
5
6
7
8
9
—
E
H
L
P
Blank
portion duration is less than 1
μ
sec. The backplane disable
sensing circuit will not respond to such a short signal.
Input Configuration and Output Codes
The TC7211AM accepts a 4-bit, true binary (positive
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.
The TC7211AM is designed to interface with a data bus
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.
For applications where bus compatibility is not required,
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.
Figure 3. TC7211AM Driving an 8-Digit LCD Display
in Master/Slave Configuration
Figure 4. Segment Assignment
Special Order Decoder Option
The TC7211AM is mask programmed to give the 16
combinations of 7-segment output codes. For large volume
orders (50K pieces minimum), custom decoder options are
available. Contact TelCom Semiconductor for details.
D8 D7 D6
D5 D4
D3 D2 D1
8-DIGIT
LCD
BACKPLANE
SLAVE
BCD/BINARY
DATA
BACKPLANE
MASTER
+5V
V+
BACKPLANE
28
+5V
4
4
4
V+
GND
OSC
SEGMENTS
HIGH ORDER
B3–
B0 CS1
BP
GND
OSC
SEGMENTS
HIGH ORDER
B0
BP
TC7211AM
28
DS1
CS2
DS2
CS1
DS1
CS2
DS2
SECHIP
SDIGIT
G
A
B
C
F
E
D
Table 1. Binary Codes Versus Character Displayed
BUS COMPATIBLE, 4-DIGIT
CMOS DECODER/DRIVER
TC7211AM
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