4
SY10E136
SY100E136
Micrel, Inc.
M9999-032006
hbwhelp@micrel.com or (408) 955-1690
LOGIC DIAGRAM
TRUTH TABLE(1)
S1
S2
CIN
MR
CLK
Function
L
X
L
Z
Preset Parallel Data Inputs
L
H
L
Z
Increment (Count Up)
L
H
L
Z
Hold Count
H
L
Z
Decrement (Count Down)
H
L
H
L
Z
Hold Count
H
X
L
Z
Hold Count
X
H
X
Reset (Qn = LOW; COUT = HIGH)
Note:
1. Expanded truth table included on following pages.
LOGIC DIAGRAM
EXPANDED TRUTH TABLE(1)
Function
S1
S2
MR
CIN CLIN CLK
D5
D4
D3
D2
D1
D0
Q5
Q4
Q3
Q2
Q1
Q0 COUT CLOUT
Preset
L
X
Z
LLLL
H
LLLL
H
Down
H
LLLL
Z
XXXXXX
LLLL
H
L
H
LLLL
Z
XXXXXX
LLLLL
H
L
H
LLLL
Z
XXXXXX
LLLLLLL
H
LLLL
Z
XXXXXX
HHHHHHH
H
Preset
L
X
Z
HHHH
L
HHHH
L
H
Up
L
H
L
Z
XXXXXX
HHHH
L
H
L
H
L
Z
XXXXXX
HHHHH
L
H
L
H
L
Z
XXXXXX
HHHHHH
L
H
L
H
L
Z
XXXXXX
LLLLLL
H
L
H
L
Z
XXXXXX
LLLLL
H
L
H
L
Z
XXXXXX
LLLL
H
L
H
Hold
H
L
X
Z
XXXXXX
LLLL
H
L
H
L
X
Z
XXXXXX
LLLL
H
L
H
Down
H
LLLL
Z
XXXXXX
LLLLL
H
L
Hold
H
L
H
L
Z
XXXXXX
LLLLL
H
Down
H
LLLL
Z
XXXXXX
LLLLLLL
H
Hold
H
L
H
L
Z
XXXXXX
LLLLLL
H
L
H
L
Z
XXXXXX
LLLLLL
H
L
H
HZ
XXXXXX
LLLLLL
H
Hold
H
L
H
Z
XXXXXX
LLLLLLL
H
LLLL
Z
XXXXXX
LLLLLLL
H
Hold
H
L
Z
XXXXXX
LLLLLLL
H
Preset
L
X
Z
HHHH
L
HHHH
L
H
Up
L
H
L
Z
XXXXXX
HHHH
L
H
L
H
L
Z
XXXXXX
HHHHH
L
H
L
Hold
L
H
L
H
L
Z
XXXXXX
HHHHH
L
H
Up
L
H
L
Z
XXXXXX
HHHHHH
L
H
Hold
L
H
L
H
L
Z
XXXXXX
HHHHHHH
H
L
H
L
H
HZ
XXXXXX
HHHHHHH
H
Hold
L
H
L
Z
XXXXXX
HHHHHH
L
H
Up
L
H
L
Z
XXXXXX
LLLLLL
H
L
H
L
Z
XXXXXX
LLLLL
H
L
H
L
Z
XXXXXX
LLLL
H
L
H
L
H
L
Z
XXXXXX
LLLL
H
Reset
X
H
XXXXXXXXX
LLLLLL
H
Note:
1. Z = LOW-to-HIGH transition