273
11.1.3
Pin Configuration
Table 11.1 shows the pins assigned to the DTMF generator.
Table 11.1
Pin Configuration
Name
Abbrev.
I/O
Function
DTMF output reference level
power supply pin
VT
ref
—
Reference level voltage for DTMF
output
DTMF signal output pin
TONED
Output
DTMF signal output
11.1.4
Register Configuration
Table 11.2 shows the register configuration of the DTMF generator.
Table 11.2
Register Configuration
Name
Abbrev.
R/W
Initial Value
Address
DTMF control register
DTCR
R/W
H'40
H'FFB2
DTMF load register
DTLR
R/W
H'E0
H'FFB3