MC68HC908AB32CFU Freescale Semiconductor, MC68HC908AB32CFU Datasheet - Page 82

• Manufacturer Part Number: MC68HC908AB32CFU
• Description: IC MCU 8MHZ 32K FLASH 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908AB32CFU

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM
• Number Of I /o: 51
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

EEPROM
Technical Data
82
Address:
Address:
These two read/write registers are respectively loaded with the contents
of the EEPROM timebase divider non-volatile registers (EEDIVHNVR
and EEDIVLNVR) after a reset.
EEDIVSECD — EEPROM Divider Security Disable
EEDIV[10:0] — EEPROM Timebase Prescaler
Reset:
Reset:
Read:
Write:
Read:
Write:
This bit enables/disables the security feature of the EEDIV registers.
When EEDIV security feature is enabled, the state of the registers
EEDIVH and EEDIVL are locked (including this EEDIVSECD bit). The
EEDIVHNVR and EEDIVLNVR non-volatile memory registers are
also protected from being erased/programmed.
These prescaler bits store the value of EEDIV which is used as the
divisor to derive a timebase of 35µs from the selected reference clock
source (CGMXCLK or bus clock, see
for the EEPROM related internal timer and circuits. EEDIV[10:0] bits
are readable at any time. They are writable when EELAT=0 and
EEDIVSECD=1.
1 = EEDIV security feature disabled
0 = EEDIV security feature enabled
Figure 5-5. EEPROM Divider Register High (EEDIVH)
EEDIVSECD
Figure 5-6. EEPROM Divider Register Low (EEDIVL)
EEDIV7
$FE1A
$FE1B
Bit 7
Bit 7
EEDIV6
R
6
6
EEPROM
EEDIV5
R
5
5
Contents of EEDIVHNVR ($FE10)
Contents of EEDIVLNVR ($FE11)
EEDIV4
R
4
4
EEDIV3
6.5 Configuration Register
R
3
3
MC68HC908AB32
EEDIV10
EEDIV2
Freescale Semiconductor
2
2
EEDIV9
EEDIV1
1
1
—
EEDIV8
EEDIV0
Rev. 1.1
Bit 0
Bit 0
2)