mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 106
mc68hc908bd48
Manufacturer Part Number
mc68hc908bd48
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908BD48.pdf
(288 pages)
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System Integration Module (SIM)
7.7.2 Stop Mode
Data Sheet
106
NOTE:
In stop mode, the SIM counter is reset and the system clocks are
disabled. An interrupt request from a module can cause an exit from stop
mode. Stacking for interrupts begins after the selected stop recovery
time has elapsed. Reset or break also causes an exit from stop mode.
The SIM disables the oscillator signals (OSCOUT and OSCXCLK) in
stop mode, stopping the CPU and peripherals. Stop recovery time is
selectable using the SSREC bit in configuration register 1 (CONFIG1). If
SSREC is set, stop recovery is reduced from the normal delay of 4096
OSCXCLK cycles down to 32. This is ideal for applications using canned
oscillators that do not require long start-up times from stop mode.
External crystal applications should use the full stop recovery time by
clearing the SSREC bit.
EXITSTOPWAIT
NOTE: EXITSTOPWAIT = RST pin OR CPU interrupt OR break interrupt
OSCXCLK
RST
IDB
IAB
IDB
IAB
Figure 7-14. Wait Recovery from Interrupt or Break
System Integration Module (SIM)
$A6
Figure 7-15. Wait Recovery from Internal Reset
$A6
$6E0B
$A6
$6E0B
$A6
$A6
$A6
Cycles
32
$6E0C
$01
$00FF
Cycles
32
$0B
$00FE
MC68HC908BD48
$6E
RST VCT H RST VCT L
Freescale Semiconductor
$00FD
$00FC
—
Rev. 2.1
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