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143
CHAPTER 7 INTERRUPT
■
Extended Intelligent I/O Service (EI
2
OS) Status Register (ISCS)
The ISCS is an 8-bit register. The ISCS indicates the update/fixed for the buffer address pointer and I/O
register address pointer, transfer data format (byte or word), and transfer direction. Figure 7.6-5 shows the
configuration of the ISCS.
Figure 7.6-5 Configuration of EI
2
OS Status Register (ISCS)
■
Buffer Address Pointer (BAP)
The BAP is a 24-bit register that retains the address used by EI
2
OS for the next transfer. Since one
independent BAP exists for each EI
2
OS channel, each EI
2
OS channel can transfer data between any
address in the 16-megabyte space and the I/O. If the BF bit (BAP update/fixed selection bit in the EI
2
OS
status register) in the EI
2
OS status register (ISCS) is set to "update yes", only the lower 16 bits (BAPM,
BAPL) of the BAP change; the upper 8 bits (BAPH) do not change. Figure 7.6-6 shows the configuration
of the BAP.
Initi
a
l v
a
l
u
e
EI
2
O
S
termin
a
tion control
b
it
Not termin
a
ted
b
y
a
re
qu
e
s
t from the peripher
a
l f
u
nction.
Termin
a
ted
b
y
a
re
qu
e
s
t from the peripher
a
l f
u
nction
D
a
t
a
tr
a
n
s
fer direction
s
pecific
a
tion
b
it
I/O regi
s
ter
a
ddre
ss
pointer
→
bu
ffer
a
ddre
ss
pointer.
B
u
ffer
a
ddre
ss
pointer
→
I/O regi
s
ter
a
ddre
ss
pointer
BAP
u
pd
a
te/fixed
s
election
b
it
After d
a
t
a
tr
a
n
s
fer, the
bu
ffer
a
ddre
ss
pointer i
s
u
pd
a
ted. (*1)
After d
a
t
a
tr
a
n
s
fer, the
bu
ffer
a
ddre
ss
pointer i
s
not
u
pd
a
ted.
Tr
a
n
s
fer d
a
t
a
length
s
pecific
a
tion
b
it
Byte
Word
After d
a
t
a
tr
a
n
s
fer, the
bu
ffer
a
ddre
ss
pointer i
s
not
u
pd
a
ted.
IOA
u
pd
a
te/fixed
s
election
b
it
After d
a
t
a
tr
a
n
s
fer, the I/O regi
s
ter
a
ddre
ss
pointer i
s
u
pd
a
ted. (*2)
Re
s
erved
b
it
s
0 m
us
t
b
e written to the
s
e
b
it
s
.
R/W:
X:
*1
*2
Re
a
d-write
Undefined
Only the lower 16
b
it
s
of the
bu
ffer
a
ddre
ss
pointer ch
a
nge. The
bu
ffer
a
ddre
ss
pointer
The
a
ddre
ss
pointer c
a
n only
b
e incremented.
c
a
n only
b
e incremented.
b
it
7
6
5
4
3
2
1
0
Summary of Contents for MB90460 Series
Page 1: ...The following document contains information on Cypress products ...
Page 3: ......
Page 5: ......
Page 9: ...iv ...
Page 41: ...22 CHAPTER 1 OVERVIEW ...
Page 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Page 83: ...64 CHAPTER 3 CPU ...
Page 95: ...76 CHAPTER 4 RESET ...
Page 107: ...88 CHAPTER 5 CLOCK ...
Page 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 175: ...156 CHAPTER 7 INTERRUPT ...
Page 181: ...162 CHAPTER 8 MODE SETTING ...
Page 223: ...204 CHAPTER 9 I O PORT ...
Page 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Page 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Page 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Page 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Page 485: ...466 CHAPTER 16 PWC Timer ...
Page 531: ...512 CHAPTER 17 UART ...
Page 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Page 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Page 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Page 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Page 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Page 715: ...696 APPENDIX ...
Page 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 739: ......