MC908SR12CFAE Freescale Semiconductor, MC908SR12CFAE Datasheet - Page 151
![IC MCU 12K FLASH 8MHZ 48-LQFP](/photos/12/45/124574/mc908sr12cfae_sml.jpg)
MC908SR12CFAE
Manufacturer Part Number
MC908SR12CFAE
Description
IC MCU 12K FLASH 8MHZ 48-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908SR12MFAE.pdf
(404 pages)
Specifications of MC908SR12CFAE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, SCI
Peripherals
LVD, POR, PWM, Temp Sensor
Number Of I /o
31
Program Memory Size
12KB (12K x 8)
Program Memory Type
FLASH
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 14x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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9.5 SIM Counter
9.5.1 SIM Counter During Power-On Reset
9.5.2 SIM Counter During Stop Mode Recovery
9.5.3 SIM Counter and Reset States
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
The SIM counter is used by the power-on reset module (POR) and in
stop mode recovery to allow the oscillator time to stabilize before
enabling the internal bus (IBUS) clocks. The SIM counter also serves as
a prescaler for the computer operating properly module (COP). The SIM
counter overflow supplies the clock for the COP module. The SIM
counter is 12 bits long and is clocked by the falling edge of ICLK.
The power-on reset module (POR) detects power applied to the MCU.
At power-on, the POR circuit asserts the signal PORRST. Once the SIM
is initialized, it enables the clock generation module (CGM) to drive the
bus clock state machine.
The SIM counter also is used for stop mode recovery. The STOP
instruction clears the SIM counter. After an interrupt, break, or reset, the
SIM senses the state of the short stop recovery bit, SSREC, in the
configuration register 1 (CONFIG1). If the SSREC bit is a logic 1, then
the stop recovery is reduced from the normal delay of 4096 ICLK cycles
down to 32 ICLK cycles. 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, that
is, with SSREC cleared.
External reset has no effect on the SIM counter.
for details.) The SIM counter is free-running after all reset states. (See
9.4.2 Active Resets from Internal Sources
internal reset recovery sequences.)
System Integration Module (SIM)
System Integration Module (SIM)
for counter control and
(See 9.7.2 Stop Mode
SIM Counter
Data Sheet
151
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