RA8806 Ver la hoja de datos (PDF) - RAIO
Número de pieza
componentes Descripción
Fabricante
RA8806 Datasheet PDF : 174 Pages
| |||
Preliminary Version 1.0
RA8806
Two Layers Character/Graphic LCD Controller
KF2-0: Key-Scan frequency.
If system clock is 10MHz, then the related Key-Scan timing are as
following:
Key-Scan
KF2 KF1 KF0 Pulse Width
(KOUT period)
Key-Scan
Cycle (4x8)
Key-Scan
Cycle (8x8)
00 0
16µs
64µs
128µs
2-0 0 0 1
32µs
128µs
256µs
01 0
64µs
256µs
512µs
01 1
128µs
512µs
1.024ms
10 0
256µs
1.024ms
2.048ms
10 1
512µs
2.048ms
4.096ms
11 0
1.024ms
4.096ms
8.192ms
11 1
2.048ms
8.192ms 16.384ms
000
R/W
REG [A1h] Key-Scan Controller Register 2(KSCR2)
Bit
Description
Key-Scan Wakeup Function Enable Bit
7 0: Key-Scan Wakeup function is disable.
1: KEY-SCAN Wakeup function is enable.
6-4 Reserved
Long Key Timing Adjustment
00 : About 0.625sec(for 8MHz Clock source)
3-2 01 : About 1.25sec(for 8MHz Clock source)
10 : About 1.875 sec(for 8MHz Clock source)
11 : About 2.5 sec(for 8MHz Clock source)
Numbers of Key Hit.
00 : No key is pressed
1-0 01 : One key is pressed, read REG[A2h] for the key number.
10 : Two key is pressed, read REG[A2h ~ A3h] for the key number.
11 : Three key is pressed, read REG[A2h ~ A4h] for the key number.
Default Access
0
R/W
000
R
00
R/W
00
R
REG [A2h ~ A4h] Key-Scan Data Register (KSDR0 ~ 2)
Bit
Description
Key Strobe Data
7-0 The corresponding key number that is pressed. Please reference
Section 6-5 "Key-Scan”.
Default
00h
Access
R
REG [B0h] Memory Write Command Register (MWCR)
Bit
Description
Memory data write command from the cursor position.
7-0 Note: Write memory data, user must write the MWCR command first,
then write DATA cycle.
Default Access
NA
R/W
RAiO TECHNOLOGY INC.
21/174
www.raio.com.tw
Share Link: 