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參數資料
| 型號： | HD66421 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | (RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD) |
| 中文描述： | （內存提供160通道4級灰度的點陣圖形液晶顯示驅動程序） |
| 文件頁數： | 12/46頁 |
| 文件大?。?/td> | 201K |
| 代理商： | HD66421 |
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Preliminary
Rev. 1.1E '99.02.10
HD66421
MPU Interface
The HD66421 can interface directly to an MPU
through an 8-bit data bus or through an I/O port
(figure 2). The MPU can access the HD66421
internal registers independently of internal clock
timing.
The index register can be directly accessed but the
other registers (data registers) cannot. Before
accessing a data register, its register number must
be written to the index register. Once written, the
register number is held until it is rewritten,
enabling the same register to be consecutively
accessed without having to rewrite to the register
number for each access. An example of a register
access sequence is shown in figure 3.
Figure 3 8-Bit Data Transfer Sequence
RD
WR
DB7 to
DB0
Write index
register
RS
CS
Write data
register
Write index
register
Read data
register
Read data
register
Data
Data
Data
Data
Data
Data
Write data
register
C0
C1
C2
C3
A0 - A7
CS
RS
RD
WR
DB0 - DB7
H8/325
HD66421
8
a) Interface through Bus
A15 - A0
A0
RD
WR
D0 - D7
CS
RS
RD
WR
DB0 - DB7
Z80
HD66421
8
Figure 2 8-Bit MPU Interface Examples
b) Interface through I/O Port
decoder
12
相關PDF資料 |
PDF描述 |
|---|---|
| HD66421TB0 | (RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD) |
| HD66503 | 240-Channel Common Driver with Internal LCD Timing Circuit(帶內部LCD定時電路的240通道驅動器) |
| HD66520T | 160-Channel 4-Level Grayscale Display Column Driver with Internal Bit-Map RAM(點陣圖形LCD160通道驅動器) |
| HD66522 | 160-Channel Column Driver with Internal Bit-Map RAM for Reflective Color Display and Grayscale Display(點陣圖形LCD160通道驅動器) |
| HD66523R | 240-Channel Common Driver with Internal LCD Timing Circuit(帶內部LCD定時電路的240通道驅動器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HD66421TB0 | 制造商:Renesas Electronics Corporation 功能描述: |
| HD66503 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66520 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66520T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66520TA0 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
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