
Memory Map
Monitor ROM
MC68H(R)C908JL3E/JK3E/JK1E — Rev. 1.0
Technical Data
MOTOROLA
Memory Map
35
$000B
↓
$000C
Unimplemented
Read:
Write:
$000D
Port A Input Pull-up
Enable Register
(PTAPUE)
Read:
PTA6EN
PTAPUE6 PTAPUE5 PTAPUE4 PTAPUE3 PTAPUE2 PTAPUE1 PTAPUE0
Write:
Reset:
00000000
$000E
↓
$0019
Unimplemented
Read:
Write:
$001A
Keyboard Status and
Control Register
(KBSCR)
Read:
0000
KEYF
0
IMASKK
MODEK
Write:
ACKK
Reset:
00000000
$001B
Keyboard Interrupt
Enable Register
(KBIER)
Read:
0
KBIE6
KBIE5
KBIE4
KBIE3
KBIE2
KBIE1
KBIE0
Write:
Reset:
00000000
$001C
Unimplemented
Read:
Write:
$001D
IRQ Status and Control
Register
(INTSCR)
Read:
0000
IRQF1
0
IMASK1
MODE1
Write:
ACK1
Reset:
00000000
$001E
Configuration Register 2
(CONFIG2)
Read:
IRQPUD
RR
LVIT1
LVIT0
RRR
Write:
Reset:
000
0*
000
$001F
Configuration Register 1
(CONFIG1)
Read:
COPRS
R
LVID
R
SSREC
STOP
COPD
Write:
Reset:
00000000
One-time writable register after each reset. * LVIT1 and LVIT0 reset to logic 0 by a power-on reset (POR) only.
$0020
TIM Status and Control
Register
(TSC)
Read:
TOF
TOIE
TSTOP
00
PS2
PS1
PS0
Write:
0
TRST
Reset:
00100000
Addr.
Register Name
Bit 7
654321
Bit 0
= Unimplemented
R
= Reserved
Figure 2-2. Control, Status, and Data Registers (Sheet 2 of 5)