PCD3332-2 Datasheet, PDF (11/32 Pages) NXP Semiconductors – Multistandard pulse/tone repertory diallers/ringers

Philips Semiconductors
Multistandard pulse/tone repertory
diallers/ringers
Product specification
PCD3332-2; PCD3332-3;
PCD3332-S
In the on-hook mode or power-down mode of the
PCD3332-3, the keyboard I/Os are set to HIGH except
ROW 5 which is set to LOW. In this instance, depression
of the HOOK key can be detected by the external
hardware circuitry and converted to an active HIGH signal
which is passed to CE in order to ‘wake-up’ the
PCD3332-3.
When the HOOK key has been accepted the PCD3332-3
enters the hands-free mode.
ROW 5 was used to detect the HOOK key, this function is
deleted.
ROW 5 is an open-drain input, this configuration is used to
avoid current flowing in the on-hook mode or power-down
mode. A pull-up resistor should be connected to ROW 5.
The keyboards which the PCD3332-2, PCD3332-3 and
PCD33332-S support are shown in Figs 6, 7 and 8
respectively. The figures also show the diode options as
‘dotted’ keys.
5.2 Keyboards
handbook, full pagewidth
ROW 1
COL 1
1
ROW 2
4
ROW 3
7
COL 2
2
5
8
COL 3
3
COL 4
STORE
6
TONE
9
VOL
COL 5
M1
M3
M5
COL 6
M2
M4
MRC
M6
FTS A
FTS B
TBT A
ROW 4
*
0
#
VOL
M7
M8
TBT B
ROW 5 FLASH
PAUSE
LNR
M9
M10
RMS
Diode M/S
F/E
RDS
MLA
APT
PTS
MBE756
Fig.6 Keyboard layout (PCD3332-2).
1997 Jan 13
11