NJU6625 New Japan Radio Co.,Ltd, NJU6625 Datasheet
NJU6625
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NJU6625 Summary of contents
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... DOT MATRIX LCD CONTROLLER DRIVER with SMOOTH SCROLL FUNCTION ¢ GENERAL DESCRIPTION The NJU6625 is a Dot Matrix LCD controller driver for 12-character 1-line with icon display in single chip. It contains bleeder resistance, general output port, keyscan circuit, CR oscillator, microprocessor interface circuit, ...
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... NJU6625FG1 ...
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... Key request signal output terminal. I Key scanning input terminals. LCD segment driving signal output / Key scanning output O terminals. O LCD segment driving signal output terminals. O LCD common driving signal output terminals. O LCD Icon common driving signal output terminals. NJU6625 =0V SS 145KHz ). OSC - 3 - ...
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... FUNCTIOAL DESCRIPTION (1-1) Register The NJU6625 incorporates two 8 -bit registers, an Instruction Register (IR) and a Data Register (DR). The Register (IR) stores instruction codes such as “Clear Display” and “Cursor Shift” or address data for Display Data RAM (DDRAM), Character Generator ROM (CGRAM) and Icon Display RAM (MKRAM). ...
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... Preliminary Table 1-1. CG ROM Character Pattern ( ROM version - RAM (01) (17) (02) (18) (03) (19) (04) (20) (21) (05) (22) (06) (07) (23) (08) (24) (09) (25) (10) (26) (11) (27) (12) (28) (13) (29) (14) (30) (15) (31) (16) (32) Ver.2008-03-21 NJU6625 - 5 - ...
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... Prelimina ry NJU6625 Table 1-2. CG ROM Character Pattern ( ROM version – RAM (01) (17) (02) (18) (03) (19) (04) (20) (21) (05) (22) (06) (07) (23) (08) (24) (09) (25) (10) (26) (11) (27) (12) (28) (13) (29) (14) (30) (15) (31) (16) (32 Ver.2008-03-21 ...
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... NJU6625 -(1F) should H H Character Pattern (CG RAM Data Upper Lower bit bit ...
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... Prelimina ry NJU6625 (1-6) Icon Display RAM (MK RAM) The NJU6625 can display maximum 60 Icons. The Icon Display can be controlled by writing the Data in MK RAM corresponds to the Icon. The relation between MK RAM address and Icon Display position is shown below: COM 1 COM 2 COM 3 COM 4 COM ...
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... LCD driving waveform. Note) Display The NJU6625 generate “SPACE ” automatically on the segment terminals. Which are six times number of lines, regardless the smooth scroll function. In busy of the smooth scroll operation, this “SPACE ” scrolls also with characters, there is no icon on the segment terminals which are six times number of lines ...
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... Request signal output When the NJU6625 detect the key-in by the key scan circuit, it outputs “H” signal as the request signal from the “REQ” terminal to notice the key pressing information to an application system. The request signal resets to “L” level before 2 clock of next scanning. ...
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... NJU6625 shown below LCD2 KL1 KL0 KH2 KH1 - KH0 ...
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... NJU6625 NJU6625 “1” but another bits go to “0”. The key connected with the S ...
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... A, The voltage of the key input terminal falls. The LCD DD voltage of the key input terminal lowers more than V NJU6625 is “L” level. In addition, even if the key is not pushed, REQ=”H” is output. Therefore in case of the power-supply voltage is V this V <V period, Key data must not be read ...
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... In this case the initialization by MPU software is required. (2-2) Initialization By Hardware The NJU6625 incorporates RESETb terminal to initialize the all system. When the "L" level input over 1.2ms to the RESETb terminal, reset sequence is executed. In this time, busy signal output during 250us (fosc=145kHz) after RESETb terminal goes to "H". During this 250us period, any other instruction must not be input to the NJU6625 ...
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... Preliminary (3) Instructions The NJU6625 incorporates two registers, an Instruction Register (IR) and a Data Register (DR). These two registers store control information temporarily to allow interface between NJU6625 and MPU or peripheral ICs operating different cycles. Instruction (a) Maker Testing 1 (b) Clear Display 1 (c) Return Home ...
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... Prelimina ry NJU6625 (3-1) Description of each instructions (a) Maker Test Code This code is using for device testing mode (only for maker). Therefore, please avoid all "0" input or no meaning Enable signal input at data "0". (Especially please check the output condition of Enable signal when the power turns on.) ...
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... (2) Blink display example NJU6625 (D) and DB (B), as shown 2 0 Alternating display ...
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... Prelimina ry NJU6625 (g) Display Shift Code The Display shift instruction shifts the Display to the right or left without writing or reading display data. The contents of address counter (AC) does not change by operation of the display shift only. DRL 0 Shifts the whole display to the left and the cursor follows it. ...
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... SC0 0 No shift dot-shift to the left dot-shift to the left dot-shift to the left dot-shift to the left dot-shift to the left. 0 Don’t Care. 1 NJU6625 SC2 SC1 ...
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... Prelimina ry NJU6625 Smooth scroll sequence One out of the following three types of smooth scroll can be selectd by the instructions. 1 dot smooth scroll 1 dot-shift 2 dot-shift 3 dot-shift 4 dot-shift 5 dot-shift Display Shift 1 dot-shift 2 dot-shift 3 dot-shift 4 dot-shift 5 dot-shift Display Shift - 20 - Number of dot-shift ...
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... For example, the address (0D), auto-increments to (00), at the timing of the write to RAM instruction, then the address (00), returns to 1st line scroll RAM position by the display shift instruction. , (0D NJU6625 < DD RAM Address > Setting address in (AC) Scroll RAM 1ch ...
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... Prelimina ry NJU6625 (k) Set Display Mode Code The Set Display Mode instruction control the function of keyscan and power down mode Keyscan ON Keyscan OFF 0 In busy of keyscan (t voltage Power down mode. 1 All common and segment terminal set the voltage level Release the power down mode ...
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... RAM. The selection of RAM is determined 0 and (1D) are not displayed, bat the automatic address KL3 Input NJU6625 DD6 DD5 DD4 DD3 DD2 DD1 ...
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... Prelimina ry NJU6625 (3-2) Initialization by instruction If the power supply conditions for the correct operation of the internal reset circuits are not satisfied, the NJU6625 must be initialized by the instruction. Power ON Wait more than 1.5ms after V rises to 2.4V DD Display ON/OFF Entry Mode Set Set Static Port ...
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... External clock can also be 1 pin. 1 NJU6625 OSC 1 NJU6625 and V is needed for stabilizing V SS 1/8 1 the maximum amplitude LCD LCD2 SS for LCD driving voltage. Internal NJU6625 E.V.R (16 Step) 6.6KΩ V LCD 4KΩ 4KΩ LCD 2 3 4KΩ 4KΩ V ...
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... The inputs data and latched at rising edge of shift clock (SCL) and the first 16-bit data are fetched into the NJU6625 at the rising edge of chip select (CSb). The data over than 16 bits are ignored. If the input data are less than 16 bits, they are ignored at the rising edge of "CSb". Therefore, just 16 bits data should be input for the correct communication ...
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... DD OSC Rosc=430kΩ Input from OSC Input from OSC 1 V Terminal, V =0V LCD1 SS LCD1 E.V.R Value : ”1111” LCD1 ° =8.0V, Ta=25 LCD1 SS NJU6625 °C (Ta=25 ) UNIT NOTE Terminal LCD1 V °C °C mW and due to the stabilized SS LCD1 SS (V =4.5V to 5.5V Ta= -40 to +85°C) ...
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... V DD Note 10) Apply to the SCL RESETb Terminals. Note 11) The external clock frequency is half divided by the built-in frequency divider, therefore the frame frequency is as the same as when the internal oscillation circuit is used NJU6625 COM /COMMK) and supply voltage (V ...
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... DD SYMBOL t CYCE CSU t CHI t SISU t SIH t KDD t SRWD t CRWD t CH2 t t CYCE SIH SISU KDD Output Output NJU6625 =V +8.0V Ta=-40 to +85°C) LCD1 SS MIN MAX UNIT CONDITION 300 - ns 100 - us 300 - ns 300 - ns 300 - ns 300 - ns - 300 ns - 300 ns - 300 ...
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... Prelimina ry NJU6625 The Input Condition when using the Hardware Reset Circuit PARAMETER Reset input “L” level width (f =145KHz) OSC RESET Power Supply Condition when using the internal initialization circuit PARAMETER Power supply rise time Power supply OFF time Since the internal initialization circuits will not operate normally unless the above conditions are met, in such a case initialize by instruction ...
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... COM LCD SEG LCD SEG Ver.2008-03-21 Key ････ Mark scan NJU6625 Key ････ Mark scan Is Keyscan waveform - 31 - ...
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... Prelimina ry NJU6625 ¢ APPLICATION CIRCUITS CPU LCD1 + + + + - 32 - OSC COMMK 1 REQ DATA SCL CSb RESETb NJU6625 LCD1 V LCD2 COM 1 COM 7 LCD Panel 12-character SEG 1 1-line+Icon SEG 71 [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions ...