MCHC908GR8AVFAE Freescale Semiconductor, MCHC908GR8AVFAE Datasheet - Page 170

• Manufacturer Part Number: MCHC908GR8AVFAE
• Description: IC MCU 8K FLASH 8MHZ 32-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MCHC908GR8AVFAE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 21
• Program Memory Size: 7.5KB (7.5K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

System Integration Module (SIM)
14.6.2 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 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 CONFIG1 register.
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 startup times from stop
mode.
The SIM counter is held in reset from the execution of the STOP instruction until the beginning of stop
recovery. It is then used to time the recovery period.
Figure 14-19
170
shows stop mode recovery time from interrupt.
EXITSTOPWAIT
Note: EXITSTOPWAIT = RST pin or CPU interrupt
External crystal applications should use the full stop recovery time by
clearing the SSREC bit unless the OSCSTOPENB bit is set in CONFIG2.
To minimize stop current, all pins configured as inputs should be driven to
a 1 or 0.
CGMXCLK
RST
IDB
IAB
IDB
IAB
$A6
Figure 14-17. Wait Recovery from Internal Reset
$A6
MC68HC908GR8A • MC68HC908GR4A Data Sheet, Rev. 5
Figure 14-16. Wait Recovery from Interrupt
$6E0B
$A6
$6E0B
$A6
$A6
$A6
CYCLES
$6E0C
32
NOTE
NOTE
$01
Figure 14-18
$00FF
CYCLES
32
$0B
$00FE
$6E
shows stop mode entry timing.
RST VCT H
$00FD
RST VCT L
$00FC
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