user manual

Carrier Modulator Transmitter (CMT)
General Release Specification MC68HC05RC16 — Rev. 3.0
72 Carrier Modulator Transmitter (CMT) MOTOROLA
9.4.2 Carrier Generator Data Registers (CHR1, CLR1, CHR2, and CLR2)
The carrier generator contains two, 7-bit data registers: primary high
time (CHR1), primary low time (CLR1); and two, 6-bit data registers:
secondary high time (CHR2) and secondary low time (CLR2). Bit 7 of
CHR1 and CHR2 is used to read and write the IRO latch.
Address: $0010
Bit 7 654321Bit 0
Read:
IROLN 0 PH5 PH4 PH3 PH2 PH1 PH0
Write:
Reset: 0 0 UUUUUU
U = Unaffected
Figure 9-3. Carrier Generator Data Register CHR1
Address: $0011
Bit 7 654321Bit 0
Read:
IROLP 0 PL5 PL4 PL3 PL2 PL1 PL0
Write:
Reset: 0 0 UUUUUU
U = Unaffected
Figure 9-4. Carrier Generator Data Register CLR1
Address: $0012
Bit 7 654321Bit 0
Read:
0 0 SH5 SH4 SH3 SH2 SH1 SH0
Write:
Reset: 0 0 UUUUUU
U = Unaffected
Figure 9-5. Carrier Generator Data Register CHR2