XE0068DT Cermetek Microelectronics, XE0068DT Datasheet - Page 5

• Manufacturer Part Number: XE0068DT
• Manufacturer: Cermetek Microelectronics

Specifications of XE0068DT

• Lead Free Status / Rohs Status: Supplier Unconfirmed

XE0068DT Register Selection
Table 1 below shows the combination of RS0, /WR, and /RD to select each register.
DTMF Codes
Table 2 below shows the 4-bit codes applied to D0-D3 to represent each DTMF Digit.
XE0068DT Status Register
Table 3 below defines the bit codess which can be read from the status register.
XECOM
Table 1
Table 1
Table 3
DTMF Digit
Bit
0
1
2
3
RS0
0
0
1
1
D0
D1
D2
D3
Transmit Data Register
Receive Data Register
Delayed Steering
/WR
0
1
0
1
1
1
0
0
0
Indicator
Empty
IRQ
Full
2
0
1
0
0
/RD
3
1
1
0
0
1
0
1
0
4
0
0
1
0
5
1
0
1
0
An interrupt has occurred
(5)
Function
Write to Transmit Data Register
Read from Receive Data Register
Write to Control Register A or B
Read from Status Register
Receive Data Register
Transmitter Ready for
contains valid data
Set upon detection
of the absence of a
6
0
1
1
0
DTMF signal
New Data
7
1
1
1
0
Status Set
8
0
0
0
1
9
1
0
0
1
0
0
1
0
1
1
1
0
1
*
after Status Register Read
Interrupt inactive, Cleared
Cleared upon detection of
Status Register has been
Status has been read or
a valid DTMF signal
#
0
0
1
1
is in non-burst mode
Status Cleared
A
1
0
1
1
Read
B
XE0068DT
0
1
1
1
C
1
1
1
1
D
0
0
0
0