MC68HC908MR8 Datasheet, PDF (92/372 Pages) Motorola, Inc – Microcontrollers

System Integration Module (SIM)
Addr.
Register Name
Bit 7
6
5
4
3
Read:
$FE00
SIM Break Status Register
(SBSR)
Write:
R
R
R
R
R
See page 106. _Re-
set:
Read: POR PIN COP ILOP ILAD
$FE01
SIM Reset Status Register
(SRSR)
Write:
R
R
R
R
R
See page 108. _Re-
set:
1
0
0
0
0
Read:
$FE03
SIM Break Flag Control
Register (SBFCR)
Write:
BCFE
R
R
R
R
See page 109. _Re-
set:
0
Note 1. Writing a logic 0 clears SB-
SW.
R ^{= Reserved}
Figure 7-2. SIM I/O Register Summary
2
1
Bit 0
SBSW
R
R
Note 1
0
0
LVI
0
R
R
R
0
0
0
R
R
R
Table 7-1 shows the internal signal names used in this section.
Table 7-1. Signal Name Conventions
Signal Name
CGMXCLK
CGMVCLK
CGMOUT
IAB
IDB
PORRST
IRST
R/W
Description
Buffered version of OSC1 from clock generator module (CGM)
PLL output
PLL-based or OSC1-based clock output from CGM module
(bus clock = CGMOUT divided by two)
Internal address bus
Internal data bus
Signal from the power-on reset module to the SIM
Internal reset signal
Read/write signal
Technical Data
92
System Integration Module (SIM)
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor