Z8F021ASH020SC datasheet(165/276 Pages) ZILOG

165 / 276 page

PS022815-0206

Flash Memory

Z8 Encore! XP® 4K Series

Product Specification

146

INFO_EN—Information Area Enable

0 = Information Area us not selected

1 = Information Area is selected. The Information Area is mapped into the Program Mem-

ory address space at addresses FE00H through FFFFH.

PAGE—Page Select

This 7-bit field identifies the Flash memory page for Page Erase and page unlocking.

Program Memory Address[15:9] = PAGE[6:0]. For the Z8F04xx devices, the upper 4 bits

must be zero. For Z8F02xx devices, the upper 5 bits must always be 0. For the Z8F01xx

devices, the upper 6 bits must always be 0.

Flash Sector Protect Register

The Flash Sector Protect (FPROT) register is shared with the Flash Page Select Register.

When the Flash Control Register is written with 73H followed by 5EH, the next write to

this address targets the Flash Sector Protect Register. In all other cases, it targets the Flash

Page Select Register.

This register selects one of the 8 available Flash memory sectors to be protected. The reset

state of each Sector Protect bit is an unprotected state. After a sector is protected by setting

its corresponding register bit, it cannot be unprotected (the register bit cannot be cleared)

without powering down the device.

Table 83. Flash Page Select Register (FPS)

BITS

FIELD

INFO_EN

PAGE

RESET

000

R/W

R/WR/W

ADDR

FF9H

Table 84. Flash Sector Protect Register (FPROT)

BITS

FIELD

SPROT7

SPROT6

SPROT5

SPROT4

SPROT3

SPROT2

SPROT1

SPROT0

RESET

000

R/W

R/WR/W

ADDR

FF9H

Z8F021ASH020SC 数据表(PDF) 165 Page - Zilog, Inc.

Z8F021ASH020SC 数据表(HTML) 165 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