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參數(shù)資料
| 型號： | ESC1621 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | RAM Mapping 32 X 4 LCD Controller for I/O uC |
| 中文描述： | 內(nèi)存映射32 × 4 LCD控制器的I / O加州大學(xué) |
| 文件頁數(shù)： | 4/7頁 |
| 文件大?。?/td> | 56K |
| 代理商： | ESC1621 |
E S C1621
p. 4
Last update: 2004-03-05 12:13
Pad Desc ription
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 ESC1621 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 com-
mand transmission between the host controller and the ESC1621 are all
enabled.
READ clock input with pull-high resistor
Data in the RAM of the ESC1621 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.
WRITE clock input with pull-high resistor
Data on the DATA line are latched into the ESC1621 on the rising edge
of the
WR
signal.
Serial data input/output with pull-high resistor
Negative power supply, ground
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 and on-chip RC oscillator is selected instead, the OSCI and
OSCO pads can be left open.
LCD power input
Positive power supply
Time base or WDT overflow flag, NMOS open drain output
2kHz or 4kHz tone frequency output pair
LCD common outputs
LCD segment outputs
2
RD
I
3
WR
I
4
5
6
DATA
GND
OSCO
I/O
—
O
7
OSCI
I
8
9
10
11,12
13~16
48~17
VLCD
VDD
IRQ
BZ,
BZ
COM0~COM3
SEG0~SEG31
I
—
O
O
O
O
Absolute Maximum Ratings
Supply Voltage…………...…..…-0.3V ~ 5.5V
Input Voltage……… V
SS
- 0.3V ~ V
DD
+ 0.3V
Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maxi-
mum Ratings” may cause substantial damage to the device. Functional operation of this de-
vice at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.
Storage Temperature……………-50
°
C ~ 125
°
C
Operating Temperature…………..-25
°
C ~ 75
°
C
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