ZEN2044F Zenic, ZEN2044F Datasheet - Page 2

• Manufacturer Part Number: ZEN2044F
• Description: 33MHz Up/down Counter
• Manufacturer: Zenic

w w w . D a t a S h e e t 4 U . c o m
2. Block diagram
DRCTCE
AD/CE[3:0]
C/D
WR
RD
D[7:0]
RESET
Vdd
Vss
CLK
SEL0[2:0]
LT0
LD0
UD/AB0
DIR0
A/UP0
B/DN0
Z/CLR0
CPU
I/F
SEL2[2:0]
LT2
LD2
UD/AB2
DIR2
A/UP2
B/DN2
Z/CLR2
CE
C/D
WR
RD
LT
LD
SEL[2:0]
UD/AB
DIR
A/UP
B/DN
Z/CLR
CE
C/D
WR
RD
LT
LD
SEL[2:0]
UD/AB
DIR
A/UP
B/DN
Z/CLR
D[7:0]
D[7:0]
Command wr
decoder
Ch.2
Direction
recognition
for up/down
c
n
t
2
EXTA
EXT
- 2 -
rd
lt
ld
B
SEL1[2:0]
EXTA2
EXTB2
SEL3[2:0]
LT1
LD1
UD/AB1
DIR1
A/UP1
B/DN1
Z/CLR1
LT3
LD3
UD/AB3
DIR3
A/UP3
B/DN3
Z/CLR3
Status
reg.
(8bit)
Reference
reg.A(24bit)
Reference
reg.B(24bit)
Up/down
counter
(24bit)
Preload reg.
(24bit)
Ch.0
Mode0,1
function
control
Comparator
A(24bit)
Comparator
B(24bit)
Latch
reg.(24bit)
CE
C/D
WR
RD
LT
LD
SEL[2:0]
UD/AB
DIR
A/UP
B/DN
Z/CLR
D[7:0]
CE
C/D
WR
RD
LT
LD
SEL[2:0]
UD/AB
DIR
A/UP
B/DN
Z/CLR
D[7:0]
(
Z2044G00 ZENIC INC.
cnt0
Ch.1
Ch.3
c
n
t
1
c
n
t
3
EXTA
EXTB
EXTA
EXTB
EXTA
EXTB
ZEN2044F
)
EXTA0
EXTA1
EXTA3
EXTB0
EXTB1
EXTB3