MC908AP32CFAE Freescale Semiconductor, MC908AP32CFAE Datasheet - Page 90

• Manufacturer Part Number: MC908AP32CFAE
• Description: IC MCU 32K FLASH 8MHZ 48-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908AP32CFAE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, IRSCI, SCI, SPI
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Controller Family/series: HC08
• No. Of I/o's: 32
• Ram Memory Size: 2KB
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Embedded Interface Type: I2C, SCI, SPI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Clock Generator Module (CGM)
PRE1 and PRE0 — Prescaler Program Bits
VPR1 and VPR0 — VCO Power-of-Two Range Select Bits
90
These read/write bits control a prescaler that selects the prescaler power-of-two multiplier, P. (See
6.3.3 PLL Circuits
PLLON bit is set. Reset clears these bits.
These prescaler bits affects the relationship between the VCO clock and the final system bus clock.
These read/write bits control the VCO’s hardware power-of-two range multiplier E that, in conjunction
with L (See
Register.) controls the hardware center-of-range frequency, f
the PLLON bit is set. Reset clears these bits.
PLLON and BCS have built-in protection that prevents the base clock
selector circuit from selecting the VCO clock as the source of the base clock
if the PLL is off. Therefore, PLLON cannot be cleared when BCS is set, and
BCS cannot be set when PLLON is clear. If the PLL is off (PLLON = 0),
selecting CGMPCLK requires two writes to the PLL control register. (See
6.3.8 Base Clock Selector
6.3.3 PLL
NOTE: Do not program E to a value of 3.
and
PRE1 and PRE0
VPR1 and VPR0
Circuits,
6.3.6 Programming the
00
01
10
11
00
01
10
Table 6-2. PRE1 and PRE0 Programming
Table 6-3. VPR1 and VPR0 Programming
MC68HC908AP A-Family Data Sheet, Rev. 3
6.3.6 Programming the
Circuit.)
NOTE
PLL.) PRE1 and PRE0 cannot be written when the
P
E
0
1
2
3
0
1
2
PLL, and
VRS
Prescaler Multiplier
VCO Power-of-Two
. VPR1:VPR0 cannot be written when
Range Multiplier
6.5.4 PLL VCO Range Select
1
2
4
8
1
2
4
Freescale Semiconductor