Z8F64220100ZDA Zilog, Z8F64220100ZDA Datasheet - Page 202

• Manufacturer Part Number: Z8F64220100ZDA
• Description: ADAPTER ICE Z8 ENCORE 64K 64LQFP
• Manufacturer: Zilog

Specifications of Z8F64220100ZDA

• Module/board Type: *
• For Use With/related Products: Z8 Encore!™
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3403

Table 95. Flash Sector Protect Register (FPROT)
PS019921-0308
BITS
FIELD
RESET
R/W
ADDR
Note: R/W1 = Register is accessible for Read operations. Register can be written to 1 only (via user code).
Caution:
Flash Sector Protect Register
Flash Frequency High and Low Byte Registers
SECT7
7
The Flash Sector Protect register
programmed or erased from user code. The Flash Sector Protect register shares its Regis-
ter File address with the Page Select register. The Flash Sector protect register can be
accessed only after writing the Flash Control register with 5EH.
User code can only write bits in this register to 1 (bits cannot be cleared to 0 by user code).
SECTn—Sector Protect
0 = Sector n can be programmed or erased from user code.
1 = Sector n is protected and cannot be programmed or erased from user code.
* User code can only write bits from 0 to 1.
The Flash Frequency High and Low Byte registers
form a 16-bit value, FFREQ, to control timing for Flash program and erase operations.
The 16-bit Flash Frequency registers must be written with the system clock frequency in
kHz for Program and Erase operations. Calculate the Flash Frequency value using the fol-
lowing equation:
FFREQ[15:0]
Flash programming and erasure is not supported for system clock frequencies be-
low 20 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 insure proper program and erase times.
SECT6
6
=
{
FFREQH[7:0],FFREQL[7:0]
SECT5
5
SECT4
(Table
4
R/W1
FF9H
95) protects Flash memory sectors from being
0
SECT3
}
=
3
System Clock Frequency
----------------------------------------------------------- -
(Table 96
Z8 Encore! XP
SECT2
1000
2
and
Product Specification
Table
SECT1
97) combine to
1
®
F64XX Series
Flash Memory
SECT0
0
188