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參數(shù)資料
| 型號： | HT1621 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | RAM Mapping 32 x 4 LCD Controller for I/O μC(存儲器映射、用于I/O接口微機(jī)的32 x 4模式LCD控制器) |
| 中文描述： | 內(nèi)存映射32 × 4 LCD控制器的I / O微控制（存儲器映射，用于的I / O接口微機(jī)的32 × 4模式液晶顯示控制器） |
| 文件頁數(shù)： | 6/20頁 |
| 文件大小： | 168K |
| 代理商： | HT1621 |
Pad Description
Pad No.
Pad Name
I/O
Function
1
CS
I
Chip selection input with pull-high resistor
When the CS is logic high, the data and command read from or
written to the HT1621 are disabled. The serial interface circuit
is also reset. But if CS is at logic low level and is input to the CS
pad, the data and command transmission between the host con-
troller and the HT1621 are all enabled.
2
RD
I
READ clock input with pull-high resistor
Data in the RAM of the HT1621 are clocked out on the falling
edge of the RD signal. The clocked out data will appear on the
DATA line. The host controller can use the next rising edge to
latch the clocked out data.
3
WR
I
WRITE clock input with pull-high resistor
Data on the DATA line are latched into the HT1621 on the ris-
ing edge of the WR signal.
4
DATA
I/O
Serial data input/output with pull-high resistor
5
VSS
Negative power supply, ground
7
OSCI
I
The OSCI and OSCO pads are connected to a 32.768kHz crystal
in order to generate a system clock. If the system clock comes
from an external clock source, the external clock source should
be connected to the OSCI pad. But if an on-chip RC oscillator is
selected instead, the OSCI and OSCO pads can be left open.
6
OSCO
O
8
VLCD
I
LCD power input
9
VDD
Positive power supply
10
IRQ
O
Time base or WDT overflow flag, NMOS open drain output
11, 12
BZ, BZ
O
2kHz or 4kHz tone frequency output pair
13~16
COM0~COM3
O
LCD common outputs
48~17
SEG0~SEG31
O
LCD segment outputs
Absolute Maximum Ratings
Supply Voltage................................. 0.3V~5.5V
Storage Temperature.................... 50
o
C~125
o
C
Operating Temperature.................. 25
o
C~75
o
C
Input Voltage....................V
SS
0.3V~V
DD
+0.3V
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maxi-
mumRatings maycausesubstantialdamagetothedevice.Functionaloperationofthisdevice
at other conditions beyond those listed in the specification is not implied and prolonged expo-
sure to extreme conditions may affect device reliability.
HT1621
6
January 10, 2001
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| HT16220 | RAM Mapping 32 x 8 LCD Controller for I/O μC(存儲器映射、用于I/O接口微機(jī)的32 x 8模式LCD控制器) |
| HT1622 | RAM Mapping 32 x 8 LCD Controller for I/O μC(存儲器映射、用于I/O接口微機(jī)的32 x 8模式LCD控制器) |
| HT1623 | RAM Mapping 48x8 LCD Controller for I/O C |
| HT1625 | RAM Mapping 64x 8 LCD Controller for I/O C |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT1621(100QFP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Controller Miscellaneous - Datasheet Reference |
| HT1621_05 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:RAM Mapping 32x4 LCD Controller for I/O MCU |
| HT1621_09 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:RAM Mapping 324 LCD Controller for I/O MCU |
| HT1621_10 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:RAM Mapping 324 LCD Controller for I/O MCU |
| HT1621B | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:RAM Mapping 324 LCD Controller for I/O MCU |
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