Z8FMC04100 ZILOG [Zilog, Inc.], Z8FMC04100 Datasheet - Page 242

• Manufacturer Part Number: Z8FMC04100
• Description: Z8 Encore-R Motor Control Flash MCUs
• Manufacturer: ZILOG [Zilog, Inc.]

220
Z8 Encore!
Product Specification
Program Memory
Bit
Position
[7:0]]
SECTn
RESET
FIELD
ADDR
BITS
R/W
Caution:
Flash Frequency High and Low Byte Registers
®
Value
0
1
Motor Control Flash MCUs
7
Table 120. Flash Frequency High Byte Register (FFREQH)
The Flash Frequency High and Low Byte registers, shown in Tables 120 and 121, com-
bine to form a 16-bit value, FFREQ, to control timing for Flash program and erase opera-
tions. The 16-bit Flash Frequency registers must be written with the system clock
frequency in kilohertz for Program and Erase operations. Calculate the Flash Frequency
value using the following equation:
FFREQ[15:0] = {FFREQH[7:0],FFREQL[7:0]} =
Flash programming and erasure is not supported for system clock frequencies below
32 KHz, above 20 MHz, or outside of the valid operating frequency range for the device.
The Flash Frequency High and Low Byte registers must be loaded with the correct value
to ensure proper program and erase times.
Description
Sector Protect
Sector n can be programmed or erased from user code.
Sector n is protected and cannot be programmed or erased from user code.
6
5
P R E L I M I N A R Y
4
FFREQH
FFAH
R/W
00H
3
System Clock Frequency
2
1000
1
PS024604-1005
0