Pin Configuration; Register Configuration; Dtmf Control Register (Dtcr); Dtmf Load Register (Dtlr) - Hitachi H8/3637 Hardware Manual

11.1.3

Pin Configuration

Table 11.1 shows the pins assigned to the DTMF generator.
Table 11.1 Pin Configuration
Name
DTMF output reference level
power supply pin
DTMF signal output pin
11.1.4

Register Configuration

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