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ST92185B Datasheet(PDF) 87 Page - STMicroelectronics

Part # ST92185B
Description  16K/24K/32K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY
PDF  178 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST92185B Datasheet(HTML) 87 Page - STMicroelectronics

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ST92185B - DISPLAY STORAGE RAM INTERFACE
TDSRAM (Cont’d)
7.3.4 Register Description
RAM INTERFACE CONFIGURATION REGIS-
TER (CONFIG )
R252 - Read/Write
Register Page: 38
Reset Value: 0000 0010 (02h)
Bit 7:2 = Reserved, keep in reset state.
Bit 1 = DON:
Display ON/OFF.
0: No display reading allowed (display slot com-
pletely used for CPU access).
1: Display reading enabled during the respective
access slot.
Note: DON can be changed only when the TRI is
off (GEN = 0).
<
Bit 0 = GEN:
RAM Interface General Enable.
0: TRI off. Display reading and CPU accesses are
not allowed. When GEN=0, the Automatic Wait
Cycle insertion, while trying to access the
TDSRAM, is disabled.
1: TRI on.
70
0
0
0
0
0
0
DON
GEN



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