MC908QC16CDZE Freescale Semiconductor, MC908QC16CDZE Datasheet - Page 120

• Manufacturer Part Number: MC908QC16CDZE
• Description: IC MCU 8BIT 16K FLASH 28-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908QC16CDZE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 24
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Processor Series: HC08QC
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: ESCI/SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 26
• Number Of Timers: 6
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, M68CBL05AE, DEMO908QB8, DEMO908QC16
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10-ch x 10-bit
• For Use With: DEMO908QC16 - BOARD DEMO FOR MC908QC16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Periodic Wakeup Module (PWU)
PWUON — Periodic Wakeup Enabled Bit
PWUCLKSEL — Periodic Wakeup Clock Select Bit
PWUF — Periodic Wakeup Flag Bit
PWUACK — Periodic Wakeup Acknowledge Bit
PWUIE — Periodic Wakeup Interrupt Enable Bit
SMODE — Periodic Wakeup Module Enabled in Stop Mode Bit
12.8.2 Periodic Wakeup Prescaler Register
The PWUP register is used to select the clock rate that will be input to the PWU counter. The prescaler
generates sixteen clock rates from either the dedicated low-power internal oscillator or from the bus clock
source (BUSCLKX4).
PS3–PS0 — Prescaler Select Bits
120
This read/write bit enables or disables the periodic wakeup module.
This read/write bit selects the clock source for the prescaler.
This read-only bit is set when the counter reaches the modulo value programmed in the PWUMOD
register. This bit is cleared by writing a 1 to the PWUACK bit or by a PWU interrupt vector fetch.
Writing a 1 to this write-only bit clears the PWUF. PWUACK always reads as 0.
This read/write bit enables periodic wakeup interrupt requests.
This read/write bit is used to allow the PWU module to continue running in stop mode.
These read/write bits select one of the sixteen prescaler outputs to be the input to the PWU counter.
1 = Periodic wakeup module is enabled.
0 = Periodic wakeup module is disabled.
1 = BUSCLKX4 is selected as the clock source for the prescaler.
0 = The internal 32 kHz RC oscillator is selected as the clock source for the prescaler.
1 = Periodic wakeup interrupt pending
0 = No periodic wakeup interrupt pending.
1 = Periodic wakeup interrupt requests enabled.
0 = Periodic wakeup interrupt requests disabled.
1 = Periodic wakeup module continues to run in stop mode.
0 = Periodic wakeup module disabled in stop mode.
Reset:
Read:
Write:
The PWUCLKSEL bit can only be written to when PWUON is clear.
The PWUP register can only be written to when PWUON is clear.
MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 5
Figure 12-3. Periodic Wakeup Prescaler Register (PWUP)
Bit 7
0
0
= Unimplemented
6
0
0
5
0
0
NOTE
NOTE
4
0
0
PS3
3
0
PS2
2
1
PS1
1
0
Freescale Semiconductor
Bit 0
PS0
0