pcf8584t-2-s911 NXP Semiconductors, pcf8584t-2-s911 Datasheet - Page 4

• Manufacturer Part Number: pcf8584t-2-s911
• Description: I2c-bus Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
4
1997 Oct 21
handbook, full pagewidth
I
(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.
2
BLOCK DIAGRAM
C-bus controller
SDA OUT
SDA/
SCL IN
SCL/
(3)
(3)
2
3
PCF8584
DATA CONTROL
SCL CONTROL
CLOCK PRESCALER
SCL MULTIPLEXER
BUS BUSY LOGIC
ARBITRATION LOGIC
19
RESET/
STROBE
(O.C.)
DIGITAL
DIGITAL
FILTER
FILTER
17
CS
(1)
MSB
PIN
PIN
X
0
6
A0
DB7
15
CLOCK REGISTER S2
DATA SHIFT REGISTER S0 AND READ BUFFER
Fig.1 Block diagram.
CONTROL STATUS
PARALLEL BUS CONTROL
MSB
ES0
0
0
DB6
14
CONTROL STATUS REGISTER S1
18
WR (R/W)
STS
ES1
INTERRUPT VECTOR S3
0
COMPARATOR S0, S0'
4
DB5
13
OWN ADDRESS S0'
PARALLEL BUS
SHIFT REGISTER
READ BUFFER
(2)
BER
ES2
S24
DB4
12
16
RD (DTACK)
CLOCK REGISTER S2
8
8
8
8
8
AD0/
LRB
S23
ENI
REGISTER S1
DB3
11
AAS
STA
S22
(2)
DB2
9
default: 00H 80XX
REGISTER ACCESS CONTROL
BUS BUFFER CONTROL
INTERRUPT CONTROL
RESET/STROBE CONTROL
STO
LAB
S21
5
INT
SCL OUT
DB1
8
0FH 68XXX
LSB
ACK
S20
BB
X
(1)
DB0
7
(3)
4
IACK
SDA IN
write only
read only
read
only
Product specification
V
20
write
only
(3)
DD
PCF8584
MBD908 - 1
1
CLK
V
10
SS