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T48C862-R8 Datasheet

  • T48C862-R8

  • MCU

  • Atmel   Atmel

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T48C862-R8
Figure 26.
Example of I/O Addressing
Module ASW
Module M1
(Address Pointer)
Subaddress Reg.
Bank of
Primary Reg.
Subport Fh
1
Module M2
Aux. Reg.
5
Module M3
Auxiliary Switch
Module
Subport Eh
Subport 1
Subport 0
2
Primary Reg.
Primary Reg.
3
4
Primary Reg.
6
I/O bus
to other modules
Indirect Subport Access
Dual Register Access
Single Register Access
(Subport Register Write)
1 Addr. (SPort) Addr. (M1) OUT
2 SPort _Data
Addr. (M1) OUT
3
(Primary Register Write)
Prim._Data Addr. (M2)
(Auxiliary Register Write)
4 Addr. (M2) Addr. (ASW) OUT
5
Aux._Data
Addr. (M2)
OUT
6
OUT
(Primary Register Write)
6 Prim._Data Addr.(M3) OUT
(Primary Register Read)
Addr. (M3)
IN
(Subport Register Read)
1 Addr. (SPort) Addr. (M1) OUT
2
Addr. (M1)
IN
Example of
qFORTH
program code
(Primary Register Read)
3
Addr. (M2)
(Auxiliary Register Read)
4 Addr. (M2) Addr. (ASW) OUT
5
Addr. (M2)
IN
IN
(Subport Register Write Byte)
1 Addr. (SPort) Addr. (M1)
OUT
2 SPort _Data(lo) Addr. (M1) OUT
2 SPort _Data(hi) Addr. (M1) OUT
(Subport Register Read Byte)
1 Addr. (SPort) Addr. (M1) OUT
2
2
Addr. (M1) IN (hi)
Addr. (M1) IN (lo)
(Auxiliary Register Write Byte)
4
5
5
Addr. (M2)
Addr. (ASW)
OUT
OUT
OUT
Aux._Data (lo) Addr. (M2)
Aux._Data (hi) Addr. (M2)
Addr.(ASW) = Auxiliary Switch Module address
Addr.(Mx)
= Module Mx address
Addr.(SPort) = Subport address
Prim._Data
= Data to be written into Primary Register
Aux._Data
= Data to be written into Auxiliary Register
Prim._Data(lo)= Data to be written into Auxiliary Register (low nibble)
Prim._Data(hi) = Data to be written into Auxiliary Register (high nibble)
SPort_Data(lo) = Data to be written into SubPort (low nibble)
SPort_Data(hi) = Data to be written into SubPort (high nibble)
(lo) = SPort_Data (low nibble)
(hi) = SPort_Data (high nibble)
31
4590B鈥?BMCU鈥?2/03

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