Datasheet

17. Flash Memory Version
page 247
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17.7 Software Commands
Read or write 16-bit commands and data from or to even addresses in the user ROM area. When writing
a command code, 8 high-order bits (D15–D8) are ignored.
Table 17.7.1. Software Commands
17.7.1 Read Array Command (FF16)
This command reads the flash memory.
By writing command code ‘xxFF16’ in the first bus cycle, read array mode is entered. Content of a
specified address can be read in 16-bit unit after the next bus cycle. The microcomputer remains in
read array mode until an another command is written. Therefore, contents of multiple addresses can
be read consecutively.
17.7.2 Read Status Register Command (7016)
This command reads the status register.
By writing command code ‘xx7016’ in the first bus cycle, the status register can be read in the second
bus cycle (Refer to 17.8 Status Register). Read an even address in the user ROM area. Do not
execute this command in EW1 mode.
Command
Program
Clear status register
Read array
Read status register
First bus cycle Second bus cycle
Block erase
Write
Write
Write
Write
Write
Mode
Read
Write
Write
Mode
X
WA
BA
Address
SRD
WD
xxD0
16
Data
(D
15 to D0)
xxFF
16
xx7016
xx5016
xx4016
xx2016
Data
(D
15 to D0)
X
X
X
WA
X
Address
SRD: Status register data (D
7 to D0)
WA : Write address (However,even address)
WD : Write data (16 bits)
BA : Highest-order block address (However,even address)
X : Any even address in the user ROM area
xx : 8 high-order bits of command code (ignored)