MCHC908GR8AVFAE Freescale Semiconductor, MCHC908GR8AVFAE Datasheet - Page 61

• 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: -

Table 4-1
Freescale Semiconductor
10. Verify the choice of P, R, N, E, and L by comparing f
11. Program the PLL registers accordingly:
operation, f
as possible to f
a. In the PRE bits of the PLL control register (PCTL), program the binary equivalent of P.
b. In the VPR bits of the PLL control register (PCTL), program the binary equivalent of E.
d. In the PLL VCO range select register (PMRS), program the binary coded equivalent of L.
e. In the PLL reference divider select register (PMDS), program the binary coded equivalent
c. In the PLL multiplier select register low (PMSL) and the PLL multiplier select register high
provides numeric examples (numbers are in hexadecimal notation):
(PMSH), program the binary equivalent of N.
of R.
Exceeding the recommended maximum bus frequency or VCO frequency
can crash the MCU.
f
BUS
2.4576
4.9152
7.3728
VCLK
2.0
4.0
8.0
2.0
4.0
8.0
2.0
4.0
8.0
(MHz)
VCLK
must be within the application’s tolerance of f
.
MC68HC908GR8A • MC68HC908GR4A Data Sheet, Rev. 5
f
RCLK
4.9152
4.9152
4.9152
8.0
8.0
8.0
4.0
4.0
4.0
8.0
8.0
8.0
(MHz)
Table 4-1. Numeric Example
P
0
0
0
0
0
0
0
0
0
0
0
0
NOTE
PCTL
E
0
1
2
0
1
2
1
2
2
0
1
2
VCLK
PMSH,L
to f
008
010
020
002
004
008
002
004
006
001
002
004
N
VRS
VCLKDES
and f
PMRS
D0
D0
D0
D0
D0
D0
C0
D0
D0
D0
80
80
L
, and f
VCLKDES
VRS
Functional Description
PMDS
. For proper
R
8
8
8
1
1
1
1
1
1
1
1
1
must be as close
61