
T6A04A
2002-03-06
16
Function Description
X-address counter and Y-(page) address counter
Figure 11-1 shows a sample operation involving the X-address counter.
After Reset is executed, the X-address (XAD) becomes 0, then X-counter/up mode is selected. Next, the
X-address is set to 62 using the SXE command.
After data has been written or read, the X-address is automatically incremented by 1.
After X-counter/down mode has been selected and data has been written or read, the X-address is
automatically decremented by 1.
When the X-counter is selected, the Y-counter is not incremented or decremented.
Figure 11-2 shows a sample operation involving the Y-address counter in 8-bit word length mode.
After Reset is executed, the Y-(page) address (page) becomes 0, then Y-(page) counter/up mode and 8-bit word
length mode are selected. After data has been written or read, the Y-(page) address counter is automatically
incremented by 1.
After Y-(page) counter/down mode has been selected and data has been written or read, the Y-(page) address is
automatically decremented by 1.
When the Y-(page) counter is selected, the X-counter is not incremented or decremented.
When operating in 6-bit word length mode, the Y-(page) address counter can court up to 19.
If Page 18 in up mode, after data has been written or read, the Y-(page) address (page) becomes 0.
If Page 0 in down mode, after data has been written or read, the Y-(page) address (page) becomes 18.
Reset
UDE 05H
SXE BEH
DAWR
DAWR
DAWR
DAWR
XAD 1
XAD 0
XAD 63
X-Counter/Down Mode
DAWR
DAWR
DAWR
UDE 04H
XAD 2
XAD 1
XAD 0
XAD 63
Data Write
XAD 62
X-Counter/Up Mode
XAD 0
X-Address Set
Figure 11-1
Reset
UDE 07H
86E 01H
SYE 2DH
DAWR
DAWR
DAWR
Page 2
X-Counter/Down Mode
Page 1
UDE 06H
DAWR
Page 14
DAWR
DAWR
Page 1
Page 0
Page 14
Page 13
Y-address Set
Y-counter/Up mode
Page 0
Word length 8 Bits/Word
DAWR
Page 0
Figure 11-2