Datasheet

I/O Section
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
Freescale Semiconductor 391
$0012
SPI Data Register
(SPDR)
Read:R7R6R5R4R3R2R1R0
Write: T7 T6 T5 T4 T3 T2 T1 T0
$0013
SCI Control Register 1
(SCC1)
Read:
LOOPS ENSCI TXINV M WAKE ILTY PEN PTY
Write:
$0014
SCI Control Register 2
(SCC2)
Read:
SCTIE TCIE SCRIE ILIE TE RE RWU SBK
Write:
$0015
SCI Control Register 3
(SCC3)
Read: R8
T8 R R ORIE NEIE FEIE PEIE
Write:
$0016
SCI Status Register 1
(SCS1)
Read: SCTE TC SCRF IDLE OR NF FE PE
Write:
$0017
SCI Status Register 2
(SCS2)
Read:000000BKFRPF
Write:
$0018
SCI Data Register
(SCDR)
Read:R7R6R5R4R3R2R1R0
Write: T7 T6 T5 T4 T3 T2 T1 T0
$0019
SCI Baud Rate Register
(SCBR)
Read: 0 0
SCP1 SCP0 R SCR2 SCR1 SCR0
Write:
$001A
IRQ Status and Control
Register (ISCR)
Read:0000IRQF0
IMASK MODE
Write:
RACK
$001B
Keyboard Status and Control
Register (KBSCR)
Read:0000KEYF0
IMASKK MODEK
Write:
ACKK
$001C
PLL Control Register
(PCTL)
Read:
PLLIE
PLLF
PLLON BCS
1111
Write:
$001D
PLL Bandwidth Control
Register (PBWC)
Read:
AUTO
LOCK
ACQ
XLD
0000
Write:
$001E
PLL Programming Register
(PPG)
Read:
MUL7 MUL6 MUL5 MUL4 VRS7 VRS6 VRS5 VRS4
Write:
$001F
Configuration Write-Once
Register
(CONFIG-1)
Read:
LVISTOP R LVIRST LVIPWR SSREC COPL STOP COPD
Write:
$0020
Timer A Status and Control
Register
(TASC)
Read: TOF
TOIE TSTOP
00
PS2 PS1 PS0
Write: 0 TRST R
$0021
Keyboard Interrupt Enable
Register (KBIER)
Read:000
KBIE4 KBIE3 KBIE2 KBIE1 KBIE0
Write:
$0022
Timer A Counter Register
High (TACNTH)
Read: Bit 15 14 13 12 11 10 9 Bit 8
Write:
$0023
Timer A Counter Register
Low (TACNTL)
Read:Bit 7654321Bit 0
Write:
$0024
Timer A Modulo Register
High (TAMODH)
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
Addr.Register Name Bit 7654321Bit 0
= Unimplemented R = Reserved
Figure B-2. I/O Data, Status and Control Registers (Sheet 2 of 4)