MC68HC908LB8CPE Freescale Semiconductor, MC68HC908LB8CPE Datasheet - Page 182
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MC68HC908LB8CPE
Manufacturer Part Number
MC68HC908LB8CPE
Description
IC MCU 8K FLASH 8MHZ 20DIP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC68HC908LB8CDWE.pdf
(234 pages)
Specifications of MC68HC908LB8CPE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Peripherals
LVR, POR, PWM
Number Of I /o
18
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 7x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68HC908LB8CPE
Manufacturer:
IR
Quantity:
10
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System Integration Module (SIM)
17.6.2 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 also causes an exit from stop mode.
The SIM disables the clock generator module outputs (BUSCLKX2 and BUSCLKX4) in stop mode,
stopping the CPU and peripherals. Stop recovery time is selectable using the SSREC bit in the mask
option register (MOR). If SSREC is set, stop recovery is reduced from the normal delay of 4096
BUSCLKX4 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 17-16
182
shows stop mode recovery time from interrupt or break.
EXITSTOPWAIT
Note: EXITSTOPWAIT = RST pin or CPU interrupt
External crystal applications should use the full stop recovery time by
clearing the SSREC bit.
To minimize stop current, all pins configured as inputs should be driven to
a logic 1 or logic 0.
BUSCLKX4
RST
IDB
IAB
IDB
IAB
$A6
Figure 17-14. Wait Recovery from Internal Reset
$A6
Figure 17-13. Wait Recovery from Interrupt
$6E0B
$A6
$6E0B
$A6
MC68HC908LB8 Data Sheet, Rev. 1
$A6
$A6
CYCLES
$6E0C
32
NOTE
NOTE
$01
Figure 17-15
$00FF
CYCLES
32
$0B
$00FE
$6E
shows stop mode entry timing.
RST VCT H
$00FD
RST VCT L
$00FC
Freescale Semiconductor
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