ICM7226A_01 Datasheet, PDF (3/19 Pages) Intersil Corporation – 8-Digit, Multi-Function, Frequency Counter/Timer

Functional Block Diagram
ICM7226A, ICM7226B
EXT OSC
INPUT
OSC
INPUT
OSC
OUTPUT
BUF OSC
OUTPUT
RESET
INPUT
INPUT A
INPUT B
OSC
SELECT
DECODER
3
8
DIGIT
DRIVERS
10⁴ OR ^100Hz
10⁵
STORE
AND RESET
LOGIC
REFERENCE
COUNTER
+10³
RANGE
SELECT
LOGIC
DIGIT
OUTPUTS
8
(8)
RANGE
CONTROL
LOGIC
5
RANGE
INPUT
EXT RANGE
INPUT
INPUT
CONTROL
LOGIC
INPUT
CONTROL
LOGIC
MAIN
EN _COUNTER
CL ^÷103
RESET
OVERFLOW
44444444
8
DATA LATCHES
OUTPUT MUX
STORE
D
Q
4
CL ^MAIN
FF
R
CONTROL
6
LOGIC
CONTROL
INPUT
DP
LOGIC
EXT
DP
INPUT
DECODER
AND LZB
LOGIC ⁷
SEGMENT
DRIVERS ₈
SEGMENT
OUTPUTS
(8)
FUNCTION
INPUT
MEAS IN
PROGRESS
OUTPUT
HOLD
INPUT
FN
CONTROL
LOGIC
6
4
4
BCD
OUTPUTS
(4)
RESET
OUTPUT
STORE
OUTPUT
3