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Chapter 23
LCD Bus Interface (LCD-I/F)
Preliminary User’s Manual U17566EE1V2UM00
(1)
LBCTL0 - LCD Bus Interface control register
The 8-bit LBCTL0 register controls the operation of the LCD Bus Interface.
Access
This register can be read/written in 8-bit or 1-bit units.
Address
FFFF FB60
H
Initial Value
00
H
. This register is cleared by any reset.
7
6
5
4
3
2
1
0
EL0
IMD0
LBC01
LBC00
TCIS0
0
TPF0
BYF0
R/W
R/W
R/W
R/W
R/W
R
R
R
Table 23-4
LBCTL0 register contents
Bit position
Bit name
Function
7
EL0
Level of signal “E” in mod68 mode
0: E is active high; data is read/written on the falling edge.
1: E is active low, data is read/written on the rising edge.
6
IMD0
Mode of external bus interface access
0: mod80 mode - control signals are WR and RD
1: mod68 mode - control signals are E and R/W
5 to 4
LBC0[1:0]
Selects the internal clock
LBC01
LBC00
Selected clock
0
0
SPCLK0
0
1
SPCLK1
1
0
SPCLK2
1
1
SPCLK5
3
TCIS0
Select interrupt generation
0: During write access to the bus interface, an interrupt is generated as soon as
data is transferred from LBDATA0 to the write buffer.
During read access from the bus interface, an interrupt is generated as soon as
data is available in the LBDATA0 and LBDATAR0 registers.
1: An interrupt is generated as soon as the read or write transfer via the bus
interface has completed.
1
TPF0
Transfer in progress on external bus interface
0: The external bus interface is idle
1: Data is transferred on the external bus interface
0
BYF0
Data register busy
0: Data can be read or written from/to LBDATA0
Data can be read from LBDATAR0
1: Register LBDATA0 (LBDATAR0) is busy
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