ptn3500dh NXP Semiconductors, ptn3500dh Datasheet - Page 5

• Manufacturer Part Number: ptn3500dh
• Description: Maintenance And Control Device
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Addressing
For addressing, see Figure 8.
Asynchronous Start
Following any Start condition on the bus, a minimum of 9 SCL clock cycles must be completed before a Stop condition can be issued. The
device does not support a Stop or a repeated Start condition during this time period.
I/O OPERATIONS (see also Figure 7)
Each of the PTN3500’s eight I/Os can be independently used as an input or output. Input I/O data is transferred from the port to the
microcontroller by the READ mode (See Figure 10). Output data is transmitted to the port by the I/O WRITE mode (see Figure 9).
2001 Jan 17
READ FROM
PORT
Maintenance and control device
DATA INTO
PORT
WRITE TO
PORT
DATA OUT
FROM PORT
(a) I/O EXPANDER
(b) MEMORY
SDA
SCL
START CONDITION
SDA
START CONDITION
S
SLAVE ADDRESS (I/O EXPANDER)
1
0
S
S
2
1
SLAVE ADDRESS (I/O EXPANDER)
0
0
0
3
1
1
4
0
SLAVE ADDRESS
0
DATA 1
0
A2 A1
5
0
0
a.
6
A2 A1
A2
A0
7
R/W
A1
8
0
A0
Figure 8. PTN3500 slave addresses
A
Figure 9. I/O WRITE mode (output)
R/W
t ph
ACKNOWLEDGE
FROM SLAVE
A0
Figure 10. I/O READ mode (input)
1
0
A
ACKNOWLEDGE
FROM SLAVE
DATA 2
A
DATA TO PORT
DATA FROM PORT
DATA 1
5
DATA 1
DATA 3
S
1
t pv
0
A
ACKNOWLEDGE
FROM SLAVE
SLAVE ADDRESS
t ps
1
A
ACKNOWLEDGE
FROM MASTER
0
b.
A2
DATA TO PORT
DATA 1 VALID
A1
DATA FROM PORT
DATA 2
DATA 4
A0
DATA 4
SW00547
0
t pv
A
A
ACKNOWLEDGE
FROM SLAVE
Product specification
PTN3500
DATA 2 VALID
1
SW00549
STOP
CONDITION
SW00548
P