EZ80F920120MOD Zilog, EZ80F920120MOD Datasheet - Page 213

• Manufacturer Part Number: EZ80F920120MOD
• Description: MODULE EZ80F92 512K 20MHZ
• Manufacturer: Zilog

Specifications of EZ80F920120MOD

• Module/board Type: Development Module
• Processor Series: EZ80F92x
• Core: eZ80
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 1 MB
• Interface Type: Cable
• Maximum Clock Frequency: 20 MHz
• Operating Supply Voltage: 0 V to 3.3 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: LQFP
• Development Tools By Supplier: eZ80F920200ZCOG
• Minimum Operating Temperature: 0 C
• For Use With/related Products: eZ80F92
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3157; EZ80F920120MOD

PS015308-0404
ten by consecutive CPU I/O writes (I/O reads and memory Read/Writes produce no
effect), the Flash Divider and Flash Write/Erase Protection registers remain locked to pre-
vent accidental overwrites of these critical Flash control register settings. Writing a value
to either the Flash Frequency Divider register or the Flash Write/Erase Protection register
automatically relocks both of the registers again.
Table 114. Flash Key Register (FLASH_KEY = 00F5h)
Flash Data Register
The Flash Data register stores the data values to be programmed to Flash memory via I/O
Write operations. This register is used for all I/O Write access to Flash, both individual
byte Writes and multibyte row programming.
For single-byte I/O Write operations, a single-byte Write to this I/O register programs the
data value into the single-byte location pointed to by the page, row, and column registers.
For multibyte I/O Write operations, the Flash controller autoincrements the column
address for each byte placed into this register. A maximum of 128 bytes of data can be pro-
grammed into Flash during a multibyte I/O Write operation. The ROW_PGM bit in the
Flash Program Control register must be set to 1 prior to beginning a multibyte I/O Write
operation.
This register does not return data from Flash memory. If read, this register returns the most
recent data value written to the register.
Bit
Reset
CPU Access
Note: W = Write Only.
Bit
Position
[7:0]
FLASH_KEY
Value Description
B6h,
49h
Sequential Write operations of the values {B6h, 49h} to this
register unlock the Flash Frequency Divider and Flash Write/
Erase Protection registers.
W
P R E L I M I N A R Y
7
0
W
6
0
W
5
0
W
4
0
W
3
0
Product Specification
W
2
0
eZ80F92/eZ80F93
W
1
0
Flash Memory
W
0
0
201