Datasheet

I/O Section
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
Freescale Semiconductor 393
$0039
Analog-to-Digital Data Register
(ADR)
Read: AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0
Write:
$003A
Analog-to-Digital Input Clock
Register (ADICLK)
Read:
ADIV2 ADIV1 ADIV0 ADICLK
0000
Write: RRRR
$0040
Timer B Status and Control
Register (TBSCR)
Read: TOF
TOIE TSTOP
00
PS2 PS1 PS0
Write: 0 TRST R
$0041
Timer B Counter Register High
(TBCNTH)
Read: Bit 15 14 13 12 11 10 9 Bit 8
Write:
$0042
Timer B Counter Register Low
(TBCNTL)
Read:Bit 7654321Bit 0
Write:
$0043
Timer B Modulo Register High
(TBMODH)
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
$0044
Timer B Modulo Register Low
(TBMODL)
Read:
Bit 7654321Bit 0
Write:
$0045
Timer B CH0 Status and
Control Register (TBSC0)
Read: CH0F
CH0IE MS0B MS0A ELS0B ELS0A TOV0 CH0MAX
Write: 0
$0046
Timer B CH0 Register High
(TBCH0H)
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
$0047
Timer B CH0 Register Low
(TBCH0L)
Read:
Bit 7654321Bit 0
Write:
$0048
Timer B CH1 Status and
Control Register (TBSC1)
Read: CH1F
CH1IE
0
MS1A ELS1B ELS1A TOV1 CH1MAX
Write: 0
$0049
Timer B CH1 Register High
(TBCH1H)
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
$004A
Timer B CH1 Register Low
(TBCH1L)
Read:
Bit 7654321Bit 0
Write:
$004B
PIT Status and Control
Register (PSC)
Read: POF
POIE PSTOP
00
PPS2 PPS1 PPS0
Write: 0 PRST
$004C
PIT Counter Register High
(PCNTH)
Read: Bit 15 14 13 12 11 10 9 Bit 8
Write:
$004D
PIT Counter Register Low
(PCNTL)
Read:Bit 7654321Bit 0
Write:
$004E
PIT Modulo Register High
(PMODH)
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
$004F
PIT Modulo Register Low
(PMODL)
Read:
Bit 7654321Bit 0
Write:
Addr.Register Name Bit 7654321Bit 0
= Unimplemented R = Reserved
Figure B-2. I/O Data, Status and Control Registers (Sheet 4 of 4)