hd66712u Renesas Electronics Corporation., hd66712u Datasheet - Page 35

• Manufacturer Part Number: hd66712u
• Description: Dot-matrix Liquid Crystal Display Controller/driver - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66712U
Reset Function
Initializing by Internal Reset Circuit
An internal reset circuit automatically initializes the HD66712 when the power is turned on. The
following instructions are executed during the initialization. The busy flag (BF) is kept in the busy state
until the initialization ends (BF = 1). The busy state lasts for 15 ms after V
the V
1. Display clear:
2. Set functions:
3. Control display on/off:
4. Set entry mode:
5. Set extension function:
6. Enable scroll:
7. Set scroll amount:
Note: If the electrical characteristics conditions listed under the Table Power Supply Conditions Using
Initializing by Hardware Reset Input
The HD66712 also has a reset input pin: RESET*. If this pin is made low during operation, an internal
reset and initialization is performed. This pin is ignored, however, during the internal reset period at
power-on.
398
(20)H to all DDRAM
DL = 1: 8-bit interface data
N = 1: 2-line display
RE = 0: Extension register write disable
BE = 0: CGRAM/SEGRAM blink off
LP = 0: Not in low power mode
D = 0: Display off
C = 0: Cursor off
B = 0: Blinking off
I/D = 1: Increment by 1
S = 0: No shift
FW = 0: 5-dot character width
B/W = 0: Normal cursor (eighth line)
NW = 0: 1- or 2-line display (depending on N)
HSE = 0000: Scroll unable
HDS = 000000: Not scroll
CC
rises to 2.7V.
Internal Reset Circuit are not met, the internal reset circuit will not operate normally and will fail
to initialize the HD66712.
CC
rises to 4.5V or 40 ms after