Datasheet

Memory Map
Input/Output (I/O) Section
MC68HC908GR8 — Rev 4.0 Technical Data
MOTOROLA Memory Map 41
$0014
SCI Control Register 2
(SCC2)
Read:
SCTIE TCIE SCRIE ILIE TE RE RWU SBK
Write:
Reset:00000000
$0015
SCI Control Register 3
(SCC3)
Read: R8
T8 DMARE DMATE ORIE NEIE FEIE PEIE
Write:
Reset:UU000000
$0016
SCI Status Register 1
(SCS1)
Read: SCTE TC SCRF IDLE OR NF FE PE
Write:
Reset:11000000
$0017
SCI Status Register 2
(SCS2)
Read:
BKF RPF
Write:
Reset:00000000
$0018
SCI Data Register
(SCDR)
Read: R7 R6 R5 R4 R3 R2 R1 R0
Write: T7 T6 T5 T4 T3 T2 T1 T0
Reset: Unaffected by reset
$0019
SCI Baud Rate Register
(SCBR)
Read:
SCP1 SCP0 R SCR2 SCR1 SCR0
Write:
Reset:00000000
$001A
Keyboard Status
and Control Register
(INTKBSCR)
Read: 0000KEYF0
IMASKK MODEK
Write:
ACKK
Reset:00000000
$001B
Keyboard Interrupt Enable
Register (INTKBIER)
Read:
KBIE3 KBIE2 KBIE1 KBIE0
Write:
Reset: 0000
$001C
Time Base Module Control
Register (TBCR)
Read: TBIF
TBR2 TBR1 TBR0
0
TBIE TBON R
Write:
TACK
Reset:00000000
$001D
IRQ Status and Control
Register (INTSCR)
Read: 0000IRQF10
IMASK1 MODE1
Write:
ACK1
Reset:00000000
Addr.Register Name Bit 7654321Bit 0
= Unimplemented R = Reserved U = Unaffected
Figure 2-2. Control, Status, and Data Registers (Sheet 3 of 8)
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
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