m66271fp Renesas Electronics Corporation., m66271fp Datasheet - Page 10

• Manufacturer Part Number: m66271fp
• Description: Operation Panel Controller
• Manufacturer: Renesas Electronics Corporation.

M66271FP
Combination of Control Input Pins for MPU Interface
Table 1 to 6 show conditions of input setting when access the control register and VRAM from MPU.
(1) Access control register (Use address = A <4:0>, Data = D <7:0>)
Table 1
(2) Writing to VRAM
Table 2
Table 3
Table 4
REJ03F0267-0200 Rev.2.00 Mar 18, 2008
Page 10 of 27
MPU
MPU
MPU
SEL
SEL
SEL
H
H
L
IOCS
(2-1) When use 8-bit MPU (MPUSEL = "L", BHE = HWR = "H": set)
(2-2) When use 16-bit MPU (In MPU controls byte access with A <0> and BHE, MPUSEL = HWR = "H": set)
(2-3) When use 16-bit MPU
H
L
L
MCS
MCS
(In MPU controls byte access with LWR and HWR, MPUSEL = BHE = A <0> = "H": set)
MCS
H
H
H
L
L
L
BHE
BHE
BHE
LWR
H
H
H
X
L
H
X
L
A <0>
A <0>
A <0>
H
H
X
X
H
H
X
L
L
L
HWR
HWR
HWR
RD
H
X
L
H
H
H
X
L
LWR
LWR
LWR
H
H
H
X
H
H
H
H
X
L
L
L
L
L
X
L
L
Write to control register
Read from control register
Invalid
Address
Invalid
Invalid
Upper
Invalid
Invalid
Invalid
Invalid
Invalid
Invalid
Upper
Invalid
Invalid
Operation
Write
Write
Write
Write
Write
Byte
Byte
Odd
Address
Lower
Invalid
Invalid
Lower
Invalid
Invalid
Invalid
Invalid
Invalid
Invalid
Invalid
Even
Write
Write
Write
Write
Write
Write
Byte
Byte
Valid Data Bus
Valid Data Bus
Valid Data Bus
Width of MPU
Width of MPU
Width of MPU
Upper 8-bit
Lower 8-bit
Lower 8-bit
Upper 8-bit
Lower 8-bit
16-bit
16-bit
8-bit
← Even if
A <0> = "H",
enable to write