uba2051t NXP Semiconductors, uba2051t Datasheet - Page 24

• Manufacturer Part Number: uba2051t
• Description: Uba2050 A ; Uba2051 A;c One-chip Telephone Ics With Speech, Dialler And Ringer Functions
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Keyboard structure
The UBA205xx supports the keyboard structure given in Fig.25. Pin C4 is not available in the UBA2050x.
For key definitions, see Table 5.
Table 5 Key definitions
Notes
1. In tone dialling mode.
2. In pulse dialling mode, when MMS resistor option is off (see Table 7).
2000 May 19
handbook, full pagewidth
[0] to [9] and [#]
[LNR/P]
[M1] to [M3]
[MEM]
[R]
[STORE]
One-chip telephone ICs with speech,
dialler and ringer functions
/T]
(2)
; [P
KEYS
T]
(1)
;
/T]
(1)
FTSA
FTSB
MMS
MBS
PPS
APT
PTS
digits; see Table 6
switch over to DTMF dialling (mixed mode dialling)
last number redial if this key is the first key pressed after going off-hook; access pause if
this key is not the first key pressed after going off-hook
direct memories
indirect memory recall
recall (flash function)
memory programming
*
1
4
7
/T
Fig.25 Keyboard structure.
2
5
8
0
3
6
9
#
24
MEM
M1
M2
M3
DEFINITION
UBA2050(A); UBA2051(A;C)
STORE
LNR/P
P->T
R
FCA139
R1
R2
R3
R4
C1
C2
C3
C4
GND
Product specification