Z8F1602 ZILOG [Zilog, Inc.], Z8F1602 Datasheet - Page 165
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Z8F1602
Manufacturer Part Number
Z8F1602
Description
Z8 Encore Microcontrollers with Flash Memory and 10-Bit A/D Converter
Manufacturer
ZILOG [Zilog, Inc.]
Datasheet
1.Z8F1602.pdf
(246 pages)
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Table 88. Flash Frequency High Byte Register (FFREQH)
Table 89. Flash Frequency Low Byte Register (FFREQL)
PS017610-0404
RESET
RESET
FIELD
FIELD
ADDR
ADDR
BITS
BITS
R/W
R/W
FFREQ[15:0]
Flash Frequency High and Low Byte Registers
Caution:
R/W
R/W
7
0
7
0
The Flash Frequency High and Low Byte registers combine to form a 16-bit value,
FFREQ, to control timing for Flash program and erase operations. The 16-bit binary Flash
Frequency value must contain the system clock frequency (in kHz) and is calculated using
the following equation:.
FFREQH—Flash Frequency High Byte
High byte of the 16-bit Flash Frequency value.
FFREQL—Flash Frequency Low Byte
Low byte of the 16-bit Flash Frequency value.
Flash programming and erasure is not supported for system clock frequen-
cies below 32KHz (32768Hz) or above 20MHz. The Flash Frequency
High and Low Byte registers must be loaded with the correct value to in-
sure proper operation of the Z8F640x family device.
=
R/W
R/W
6
0
6
0
{
FFREQH[7:0],FFREQL[7:0]
R/W
R/W
5
0
5
0
R/W
R/W
4
4
0
0
Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
FFREQH
FFREQL
FFAH
FFBH
R/W
R/W
3
0
3
0
}
=
System Clock Frequency
-------------------------------------------------------------- -
R/W
R/W
2
2
0
0
1000
R/W
R/W
1
0
1
0
Z8 Encore!
Flash Memory
R/W
R/W
0
0
0
0
®
147
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