Datasheet

Register Block
M68HC12B Family Data Sheet, Rev. 9.1
50 Freescale Semiconductor
$00A6
16-Bit Modulus Down-Counter
Control Register (MCCTL)
See page 179.
Read:
MCZI MODMC RDMCL ICLAT FLMC MCEN MCPR1 MCPR0
Write:
Reset:00000000
$00A7
16-Bit Modulus Down-Counter Flag
Register (MCFLG)
See page 180.
Read:
MCZF 0 0 0 POLF3 POLF2 POLF1 POLF0
Write:
Reset:00000000
$00A8
Input Control Pulse Accumulators
Control Register (ICPACR)
See page 181.
Read:
0 0 0 0 PA3EN PA2EN PA1EN PA0EN
Write:
Reset:00000000
$00A9
Delay Counter Control Register
(DLYCT)
See page 181.
Read:
000000DLY1DLY0
Write:
Reset:00000000
$00AA
Input Control Overwrite Register
(ICOVW)
See page 182.
Read:
NOVW7 NOVW6 NOVW5 NOVW4 NOVW3 NOVW2 NOVW1 NOVW0
Write:
Reset:00000000
$00AB
Input Control System Control
Register (ICSYS)
See page 182.
Read:
SH37 SH26 SH15 HS04 TFMOD PACMX BUFEN LATQ
Write:
Reset:00000000
$00AC Reserved R R R R R R R R
$00AD
Timer Test Register
(TIMTST)
See page 183.
Read: 0 0 0 0 0 0 TCBYP PCBYP
(1)
Write:
Reset:00000000
$00AE
Timer Port Data Register
(PORTT)
See page 184.
Read:
PT7 PT6 PT5 PT4 PT3 PT2 PT1 PT0
Write:
Reset:00000000
$00AF
Data Direction Register for Timer
Port (DDRT)
See page 184.
Read:
DDT7 DDT6 DDT5 DDT4 DDT3 DDT2 DDT1 DDT0
Write:
Reset:00000000
$00B0
16-Bit Pulse Accumulator B Control
Register (PBCTL)
See page 185.
Read:
0 PBEN 0 0 0 0 PBOV 0
Write:
Reset:00000000
$00B1
Pulse Accumulator B Flag Register
(PBFLG)
See page 185.
Read:
000000PBOV0
Write:
Reset:00000000
$00B2
8-Bit Pulse Accumulator Holding
Register 3 (PA3H)
See page 186.
Read:
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Write:
Reset:00000000
Addr. Register Name Bit 7654321Bit 0
= Unimplemented R = Reserved U = Unaffected
Notes:
1. Available only on MC68HC912B32 and MC68HC912BC32 devices.
2. Available only on MC68HC912B32 and MC68HC12BE32 devices.
3. Available only on MC68HC(9)12BC32 devices.
Figure 2-1. Register Map (Sheet 11 of 19)