mc68hc08az60 Freescale Semiconductor, Inc, mc68hc08az60 Datasheet - Page 422

• Manufacturer Part Number: mc68hc08az60
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

Appendix A: Future EEPROM Registers
EEDIVH and EEDIVL Registers
MC68HC08AZ60 — Rev 1.0
422
Address:
Address:
Reset: EEDIVH-NVR
Reset: EEDIVH-NVR EEDIVH-NVR EEDIVH-NVR EEDIVH-NVR EEDIVH-NVR EEDIVH-NVR EEDIVH-NVR EEDIVH-NVR
Read:
Read:
Write:
Write:
EEDIVSECD
EEDIV7
$FE1A
$FE1B
Bit 7
Bit 7
Figure 3. EEPROM-2 Divider High Register (EEDIVH)
Figure 4. EEPROM-2 Divider Low Register (EEDIVL)
EEDIVH and EEDIVL are used to store the 11-bit EEDIV value which
can be programmed by software at system initialization or during runtime
if the EEDIVSECD bit in the EEDIVH is not cleared. The EEDIV value is
calculated by the following formula:
Where the result inside the bracket [ ]is rounded down to the nearest
interger value.
For example, if the Reference Frequency is 4.9152MHz, the EEDIV
value in the above formula will be 172. To examine the timebase output
of the divider, the Reference Frequency is divided by the calculated
EEDIV value (172), which equals to 28.577KHz in frequency or 34.99 s
in period.
Programming/erasing the EEPROM with an improper EEDIV value may
result in data lost and reduce endurance of the EEPROM device.
EEDIV6
Freescale Semiconductor, Inc.
6
6
x
For More Information On This Product,
Appendix A: Future EEPROM Registers
= Unimplemented
= Unimplemented
EEDIV
Go to: www.freescale.com
EEDIV5
5
x
5
=
INT Reference Frequency (Hz)
EEDIV4
4
4
x
EEDIV3
3
x
3
EEDIVH-NVR EEDIVH-NVR EEDIVH-NVR
EEDIV10
EEDIV2
2
2
35
10
EEDIV9
EEDIV1
6 –
1
1
+
0.5
MOTOROLA
EEDIV8
EEDIV0
Bit 0
Bit 0
2-appA