ZUSBOPTSC01ZAC datasheet(242/402 Pages) ZILOG

242 / 402 page

Program Memory

P R E L I M I N A R Y

PS024604-1005

Z8 Encore!® Motor Control Flash MCUs

Product Specification

220

Flash Frequency High and Low Byte Registers

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:

Flash programming and erasure is not supported for system clock frequencies below

32KHz, above 20MHz, 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.

Bit

Position

Value

Description

[7:0]]

SECTn

Sector Protect

Sector n can be programmed or erased from user code.

1Sector n is protected and cannot be programmed or erased from user code.

FFREQ[15:0] = {FFREQH[7:0],FFREQL[7:0]} =

System Clock Frequency

1000

Table 120. Flash Frequency High Byte Register (FFREQH)

BITS

FIELD

FFREQH

RESET

00H

R/W

ADDR

FFAH

Caution:

ZUSBOPTSC01ZAC 数据表(PDF) 242 Page - Zilog, Inc.

ZUSBOPTSC01ZAC 数据表(HTML) 242 Page - Zilog, Inc.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载