NJ88C33
Address and Sub-Address Formats
The correct addressing sequence for the NJ88C33 is
shown below. The START condition is followed by the
address byte, the acknowledge from the NJ88C33, the sub-
address byte, another acknowledge then the associated data.
The correct values for each address and sub-address are
listed, together with the message selection options.
S = Start
St = Stop
A = Acknowledge
P = Programmable (as shown)
x = Don't care
Data Formats
Each of the data formats should be preceded contiguously
by the addressing sequence given above.
R counter : single or dual modulus
Status : single or dual modulus
Status Byte
Bit
1
2
3
4
5
6
7
8
0
PORT = low
Counters off
(1)
FI and RI off
(2)
PD = polarity negative
PD bias = 0.625mA
f
VD
= RI/2
Doubler off
MOD = push-pull
1
PORT = high
Counters on
FI and RI on
PD = polarity positive
PD bias = 2.5mA
f
VD
= RI/4
Doubler on
(3)
MOD = open drain
NOTES
1. In this standby mode the counters are disabled but the
voltage doubler and I
2
C interface can both function.
2. In this standby mode the FI and RI preamplifiers are
disabled, which stops the counters and the voltage doubler.
The I
2
C interface still operates.
3. The voltage doubler should only be used when V
DD
≤
3.0V
N counter : single modulus
A/N counters : dual modulus
7
MITEL [ MITEL NETWORKS CORPORATION ]
