s908ab32ag0cfue Freescale Semiconductor, Inc, s908ab32ag0cfue Datasheet - Page 125

• Manufacturer Part Number: s908ab32ag0cfue
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

8.7.2 Stop Mode
MC68HC908AB32
Freescale Semiconductor
NOTE:
—
Rev. 1.1
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 clock generator module outputs (CGMOUT and
CGMXCLK) in stop mode, stopping the CPU and peripherals. Stop
recovery time is selectable using the SSREC bit in the configuration
register 1 (CONFIG1). If SSREC is set, stop recovery is reduced from
the normal delay of 4096 CGMXCLK 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
CGMXCLK
RST
IDB
IAB
IAB
IDB
Figure 8-13. Wait Recovery from Interrupt or Break
System Integration Module (SIM)
Figure 8-14. Wait Recovery from Internal Reset
$A6
$A6
$6E0B
$A6
$6E0B
$A6
$A6
$A6
Cycles
$6E0C
32
$01
$00FF
Cycles
$0B
32
System Integration Module (SIM)
$00FE
$6E
RST VCT H RST VCT L
$00FD
Technical Data
$00FC
125