hd66712u Renesas Electronics Corporation., hd66712u Datasheet - Page 52
hd66712u
Manufacturer Part Number
hd66712u
Description
Dot-matrix Liquid Crystal Display Controller/driver - Hitachi Semiconductor
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66712U.pdf
(88 pages)
- Current page: 52 of 88
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Interface with 4-Bit MPUs: The HD66712 can interface with a 4-bit MCU through an I/O port. 4-bit
data representing high and low order bits must be transferred sequentially.
The DL bit in function-set selects 4-bit or 8-bit interface data length.
RS
R/W
E
Internal
signal
DB7
Figure 20 Example of 4-Bit Data Transfer Timing Sequence
Instruction
write
IR7
IR3
HMCS4019R
Figure 21 4-bit MPU Interface
R10–R13
Busy flag check
D15
D14
D13
Busy
Internal operation
AC3
4
RS
R/W
E
DB4–DB7
Busy flag check
HD66712
Not
Busy
AC3
Instruction
write
D7
D3
HD66712U
415
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