Motorola MC68HC908AB32 User Manual

System Integration Module (SIM)
Low-Power Modes
MC68HC908AB32 — Rev. 1.0 Technical Data
MOTOROLA System Integration Module (SIM) 125
Figure 8-13. Wait Recovery from Interrupt or Break
Figure 8-14. Wait Recovery from Internal Reset
8.7.2 Stop Mode
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.
NOTE: External crystal applications should use the full stop recovery time by
clearing the SSREC bit.
$6E0C$6E0B $00FF $00FE $00FD $00FC
$A6 $A6 $01 $0B $6E$A6
IAB
IDB
EXITSTOPWAIT
NOTE: EXITSTOPWAIT = RST pin OR CPU interrupt OR break interrupt
IAB
IDB
RST
$A6 $A6
$6E0B
RST VCT H RST VCT L
$A6
CGMXCLK
32
Cycles
32
Cycles

Motorola MC68HC908AB32 Specifications

General

Brand	Motorola
Model	MC68HC908AB32
Category	Controller
Language	English