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M68HC08 数据表(PDF) 90 Page - Freescale Semiconductor, Inc

部件名 M68HC08
功能描述  Microcontrollers
PDF  288 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

M68HC08 数据表(HTML) 90 Page - Freescale Semiconductor, Inc

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System Integration Module (SIM)
Data Sheet
MC68HC908BD48 — Rev. 2.1
90
System Integration Module (SIM)
Freescale Semiconductor
Table 7-2 shows the internal signal names used in this section.
Table 7-1. SIM I/O Register Summary
Addr.
Register Name
Bit 7
654321
Bit 0
$FE00
SIM Break Status Register
(SBSR)
Read:
RRRRRR
SBSW
R
Write:
Note
Reset:
00000000
$FE01
SIM Reset Status
Register (SRSR)
Read:
POR
PIN
COP
ILOP
ILAD
0
0
0
Write:
POR:
10000000
$FE03
SIM Break Flag Control
Register (SBFCR)
Read:
BCFE
RRRRRRR
Write:
Reset:
0
$FE04
Interrupt Status Register 1
(INT1)
Read:
IF6
IF5
IF4
IF3
IF2
IF1
0
0
Write:
RRRRRRRR
Reset:
00000000
$FE05
Interrupt Status Register 2
(INT2)
Read:
0000
IF10
IF9
IF8
IF7
Write:
RRRRRRRR
Reset:
00000000
Note: Writing a logic 0 clears SBSW.
= Unimplemented
R
= Reserved
Table 7-2. Signal Name Conventions
Signal Name
Description
OSCXCLK
Buffered version of OSC1 from the oscillator
OSCOUT
The OSCXCLK frequency divided by two. This signal is again
divided by two in the SIM to generate the internal bus clocks.
(Bus clock = OSCXCLK divided by four)
IAB
Internal address bus
IDB
Internal data bus
PORRST
Signal from the power-on reset module to the SIM
IRST
Internal reset signal
R/W
Read/write signal



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