LC74781 Sanyo Semiconductor Corporation, LC74781 Datasheet
LC74781
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LC74781 Summary of contents
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... Ordering number : EN4988A Overview The LC74781 and LC74781M are on-screen display CMOS LSIs that display characters and patterns screen under microprocessor control. The LC74781 and LC74781M display lines of 24 characters, each dot matrix. Features • Display structure: 12 lines 288 characters) • Character structure: 12 (horizontal) 18 (vertical) dots • ...
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... Reset input Power supply (+ LC74781, 74781M Description Ground connection (digital system ground) Used to connect the crystal oscillator and capacitor used to generate the internal synchronization signal input an external clock (2fsc or 4fsc). Switches between external clock input mode and crystal oscillator mode. Low = crystal oscillator mode, high = external clock mode Outputs the blank signal (the OR of the character and border signals) ...
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... OSC F 1 OSC F 1 OSC F 1 OSC F 2 OSC Note: If the Xtal pin is used in clock input mode, be sure to prevent input noise from becoming a problem. IN LC74781, 74781M Symbol Conditions V max V 1 and V 2 pins max All pins IN V max BLANK, CHARA and SEP ...
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... Minimum input pulse width t W (CS (CS) Data setup time t SU (SIN (CS) Data hold time t h (SIN) t word One word write time t wt LC74781, 74781M unless otherwise specified DD Conditions CV pin IN CV pin OUT BLANK, CHARA and SEP pins 4.5 V, OUT –1 BLANK, CHARA and SEP pins ...
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... Serial Data Input Timing LC74781, 74781M No. 4988-5/16 ...
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... System Block Diagram LC74781, 74781M No. 4988-6/16 ...
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... LC74781/M locks into the display character data write mode, and another first byte cannot be written. When a high level is input to the CS pin, the LC74781/M is set to COMMAND0 (display memory write address setup mode). LC74781, 74781M ...
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... State 7 — — — Note: The register states are all set to zero when the LC74781/M is reset with the RST pin. COMMAND1 (Display character data write setup command) First byte DA0 to DA7 Register name State 7 — — — — — — — ...
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... Note: The register states are all set to zero when the LC74781/M is reset with the RST pin. COMMAND2 (Vertical display start position and vertical character size setup command) First byte DA0 to DA7 Register name State 7 — — — — VS21 VS20 VS11 ...
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... HP4 HP3 HP2 HP1 1 0 HP0 0 (LSB) 1 Note: The register states are all set to zero when the LC74781/M is reset with the RST pin. COMMAND4 (Display control setup command) First byte DA0 to DA7 Register name State 7 — — — — TSTMOD ...
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... BLK2 BLK1 BLK0 BK1 BK0 DSPON 1 Note: The register states are all set to zero when the LC74781/M is reset with the RST pin. COMMAND5 (Display control setup command) First byte DA0 to DA7 Register name State 7 — — — — NP1 NP0 ...
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... BCL PH2 PH1 PH0 1 Note: The register states are all set to zero when the LC74781/M is reset with the RST pin. COMMAND6 (Synchronization signal detection setup command) First byte DA0 to DA7 Register name State 7 — — — — MOD1 MOD0 ...
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... RN1 RN0 SN3 SN2 SN1 SN0 1 Note: The register states are all set to zero when the LC74781/M is reset with the RST pin. COMMAND7 (Display control setup command) First byte DA0 to DA7 Register name State 7 — — — — EX1 PD1 ...
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... The display consists of 24 characters 12 rows. The maximum number of displayed character is 288. The maximum number of characters is reduced to less than 288 when the character size is enlarged. Display memory addresses are specified as row ( decimal) and column ( decimal) addresses. Display Screen Structure (display memory addresses) LC74781, 74781M No. 4988-14/16 ...
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... Color burst high CBH V : Background color low RSL V 0: Border Pedestal Color burst low CBL V : Sync 5. LC74781, 74781M output level waveform (V OUT DD Output voltage [V] Output voltage [V] 2.70 2.90 2.11 2.31 2.11 2.31 1.75 1.96 1.59 1.80 1.54 1.75 1.43 1.65 1.12 1 ...
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... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of Feburuary, 1997. Specifications and information herein are subject to change without notice. LC74781, 74781M PS No. 4988-16/16 ...