參數(shù)資料
型號: SED1520D0A
廠商: Electronic Theatre Controls, Inc.
英文描述: DOT MATRIX LCD DRIVER
中文描述: 點(diǎn)陣液晶驅(qū)動
文件頁數(shù): 16/52頁
文件大?。?/td> 204K
代理商: SED1520D0A
2.3.12 – 2.3.12
2.0 Block Diagrams
S-MOS Systems, Inc. 150 River Oaks Parkway San Jose, CA 95134 Tel: (408) 922-0200 Fax: (408) 922-0238
371-1.0
16
2.3.12 Reset Circuit
This circuit senses the leading edge or trailing edge of RES and initializes the system when its
power is switched on.
Initialization:
(a) Display off
(b) Display start line register: First line
(c) Static drive off
(d) Column address counter: Address 0
(e) Page address register: Page 0
(f) Select duty: 1/32
(g) Select ADC: Forward (ADC command D0 = “0”, ADC status flag = “1”)
(h) Read modify write off
The input at pin RES is level-sensed to select an MPU interface mode as shown in Table 1. For
interfacing with an 80 family MPU, an “H” active reset signal is input to pin RES. For interfacing
with a 68 family MPU, an “L” active reset signal is input to the pin. (See Fig. 7.)
As exemplified in section 6 “MPU Interface”, pin RES is connected to the MPU reset pin. Thus the
SED1520 and the MPU are initialized at the same time. If system is initialized by pin RES at power-
on, it may no longer be reset.
The Reset command causes initialization (b), (d) and (e).
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