Philips Semiconductors
Product specification
I
2
C-bus controller
4
BLOCK DIAGRAM
PARALLEL BUS
DB7
15
SDA/
(3)
SDA OUT
2
DIGITAL
FILTER
MSB
READ BUFFER
read
only
DB6
14
DB5
13
DB4
12
DB3
11
DB2
9
DB1
8
DB0
7
PCF8584
handbook, full pagewidth
V DD
20
V SS
10
DATA SHIFT REGISTER S0 AND READ BUFFER
SHIFT REGISTER
8
write
only
DATA CONTROL
COMPARATOR S0, S0'
8
MSB
(1)
X
(1)
LSB
X
OWN ADDRESS S0'
8
PCF8584
INTERRUPT VECTOR S3
SCL/
(3)
SCL IN
3
DIGITAL
FILTER
0
8
S23
default: 00H 80XX
0FH 68XXX
CLOCK REGISTER S2
0
0
S24
S22
S21
S20
CLOCK REGISTER S2
8
REGISTER S1
ENI
STA
STO
ACK
write only
read only
CONTROL STATUS
SCL CONTROL
PIN
ES0
ES1
ES2
CONTROL STATUS REGISTER S1
PIN
0
STS
BER
AD0/
LRB
AAS
LAB
BB
CLOCK PRESCALER
SCL MULTIPLEXER
BUS BUSY LOGIC
ARBITRATION LOGIC
19
RESET/
STROBE
(O.C.)
17
CS
6
A0
PARALLEL BUS CONTROL
REGISTER ACCESS CONTROL
BUS BUFFER CONTROL
INTERRUPT CONTROL
RESET/STROBE CONTROL
5
(2)
18
WR (R/W)
(2)
16
RD (DTACK)
4
1
INT
(3)
SCL OUT
IACK
CLK
(3)
SDA IN
MBD908 - 1
(1) X = don’t care.
(2) Pin mnemonics between parenthesis indicate the 68000 mode pin designations.
(3) These pin mnemonics represent the long-distance mode pin designations.
Fig.1 Block diagram.
1997 Oct 21
4
PHILIPS [ NXP SEMICONDUCTORS ]
