M0220SD‐202SDAR1 Vacuum Fluorescent Display Module RoHS Compliant Newhaven Display International, Inc. 2511 Technology Drive, Suite 101 Elgin IL, 60124 Ph: 847‐844‐8795 Fax: 847‐844‐8796 www.newhavendisplay.com [email protected] [email protected] ! Important Safety Notice Please read this note carefully before using the product. Warning • The module should be disconnected from the power supply before handling. • The power supply should be switched off before connecting or disconnecting the power or interface cables. • The module contains electronic components that generate high voltages which may cause an electrical shock when touched. • Do not touch the electronic components of the module with any metal objects. • The VFD used on the module is made of glass and should be handled with care. When handling the VFD, it is recommended that cotton gloves be used. • The module is equipped with a circuit protection fuse. • Under no circumstances should the module be modified or repaired. Any unauthorized modifications or repairs will invalidate the product warranty. • The module should be abolished as the factory waste. M0220SD-202SDAR1 CONTENTS PAGE 1. FEATURES −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 2. SPECIFICATIONS 1 2-1. GENERAL SPECIFICATIONS −−−−−−−−−−−−−−−−−−−−−−−−−−−− 2-2. ENVIRONMENTAL SPECIFICATIONS −−−−−−−−−−−−−−−−−−−−− 1 2-3. ABSOLUTE MAXIMUM SPECIFICATIONS −−−−−−−−−−−−−−−−−− 2-4. DC ELECTRICAL SPECIFICATIONS −−−−−−−−−−−−−−−−−−−−−−− 2 2-5. AC ELECTRICAL SPECIFICATIONS −−−−−−−−−−−−−−−−−−−−−−− 2-5-1. MOTOROLA M68-TYPE PARALLEL INTERFACE TIMING −−− 2 2-5-2. INTEL I80-TYPE PARALLEL INTERFACE TIMING −−−−−−−−− 2-5-3. SYNCHRONOUS SERIAL INTERFACE TIMING −−−−−−−−−−−− 4 2-5-4. RESET TIMING −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 7 1 2 2 5 3. MODE OF OPERATION 3-1. PARALLEL INTERFACE MODES −−−−−−−−−−−−−−−−−−−−−−−−− 7 3-1-1. MOTOROLA M68-TYPE MODE −−−−−−−−−−−−−−−−−−−−−−−−− 3-1-2. INTEL I80-TYPE MODE −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 7 3-2. SYNCHRONOUS SERIAL INTERFACE MODE −−−−−−−−−−−−−−− 3-3. RESET MODE −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 8 8 9 4. FUNCTIONAL DESCRIPTION 4-1. ADDRESS COUNTER (AC) −−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 4-2. DISPLAY DATA RAM (DDRAM) −−−−−−−−−−−−−−−−−−−−−−−−−− 10 4-3. CHARACTER GENERATOR RAM (CGRAM) −−−−−−−−−−−−−−−− 4-4. INSTRUCTIONS −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 11 4-4-1. CLEAR DISPLAY −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 4-4-2. CURSOR HOME −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 12 4-4-3. ENTRY MODE SET −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 4-4-4. DISPLAY ON/OFF CONTROL −−−−−−−−−−−−−−−−−−−−−−−−−− 12 4-4-5. CURSOR/DISPLAY SHIFT −−−−−−−−−−−−−−−−−−−−−−−−−−−−− 4-4-6. FUNCTION SET −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 13 4-4-7. CGRAM ADDRESS SET −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 4-4-8. DDRAM ADDRESS SET −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 14 4-4-9. ADDRESS COUNTER READ −−−−−−−−−−−−−−−−−−−−−−−−−−− 4-4-10. DDRAM OR CGRAM WRITE −−−−−−−−−−−−−−−−−−−−−−−−−− 14 4-4-11. DDRAM OR CGRAM READ −−−−−−−−−−−−−−−−−−−−−−−−−−− 4-5. RESET CONDITIONS −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 15 5. CONNECTOR INTERFACE −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 16 6. JUMPER SETTING −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 16 7. CIRCUIT BLOCK DIAGRAM −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 16 FIGURE-1 MECHANICAL DRAWING −−−−−−−−−−−−−−−−−−−−−−−−− FIGURE-2 CHARACTER FONT TABLE −−−−−−−−−−−−−−−−−−−−−−−− 17 8. WARRANTY −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− 19 9. OPERATING RECOMMENDATION −−−−−−−−−−−−−−−−−−−−−−−−−− 19 10 11 12 13 14 14 15 15 18 M0220SD-202SDAR1 1. FEATURE This vacuum fluorescent display (VFD) module consists of a 20 character by 2 line 5×8 dot matrix display, DC-DC/AC converter, and controller/driver circuitry. The module can be configured for a Motorola M68-type parallel interface, an Intel I80-type parallel interface, or a synchronous serial interface. A character generator ROM with 240 5×8 characters is provided along with RAM for the user to program an additional 8 characters. The luminance level of the VFD can be varied by setting two bits in the function set instruction. Two hundred and forty character fonts consisting of a alphabets, numerals and other symbols can be displayed. This module has a dual-port RAM that allows data and instructions to be the module continuously. Thus, the busy flag is always 0 and the host never has to read the busy flag bit to determine if the module is busy. Due to this feature, the execution times for each instruction are not specified. 2 SPECIFICATIONS 2-1. GENERAL SPECIFICATIONS Table-1 Item Number of characters Character configuration C haracter H ei ght Character Width Character Pitch L i ne Pi tch D ot S i ze D ot Pi tch Peak Wavelength of Illumination Value 20 characters× 2 lines 5×8 dot matrix 5. 34 mm 2.35 mm 3.60 mm 6. 16 mm 0. 39 × 0.58 mm 0. 49 × 0.68 mm Green (λp=505nm) x=0.235, y=0.405 Minimum 350 cd/m2, 102 fL Luminance 2-2. ENVIRONMENTAL SPECIFICATIONS Item Symbol Operating Temperature Topr Storage Temperature Tstg Operating Humidity Hopr Storage Humidity Hstg Min. -40 -50 20 20 Max. +85 +95 85 90 Vibration − − 4 Shock − − 40 Typical 500 cd/m2, 146 fL Table-2 Unit Comment °C °C %RH Without condensation %RH Without condensation Total amplitude: 1.5mm Freq: 10-55 Hz sine wave G Sweep time: 1 min./cycle Duration: 2hrs./axis (X,Y,Z) Duration: 11ms G Wave form: half sine wave 3 times/axis (X,Y,Z,-X,-Y,-Z) PAGE:1/19 M0220SD-202SDAR1 2-3. ABSOLUTE MAXIMUM SPECIFICATIONS Item Supply Voltage Input signal Voltage Symbol Vcc VIN Min. -0.3 -0.3 Table-3 Unit V V Max. 6.5 Vcc+0.3 2-4. DC ELECTRICAL SPECIFICATIONS Item Symbol Supply Voltage Vcc Supply Current Icc Power Consumption − High - Level Input Voltage(see Note) VIH Low - Level Input Voltage VIL High - Level Output Voltage VOH (IOH = -0.1mA) Low - Level Output Voltage VOL (IOL = 0.1mA) Input Current (see Note) II Table-4 Max. Unit 5.5 V 190* mA 1.045 W Vcc V 0.2* Vcc V Min. 4.5 − − 0.7*Vcc 0 Typ. 5.0 140* 0.7 − − Vcc-0.5 − − V − − 0.5 V -500 − 1.0 μA Note: A 10K ohm pull-up resistor is provided on each input line. Note: Reducing Brightness Level will lower supply current by approx. 2.2mA each level. 2-5. AC ELECTRICAL SPECIFICATIONS 2-5-1. MOTOROLA M68-TYPE PARALLEL INTERFACE TIMING (See Fig. 1 and 2) Item RS, R/W Setup Time RS, R/W Hold Time Input Signal rise Time Input Signal Fall Time Enable Pulse Width High Enable Pulse Width Low Write Data Setup Time Write Data Hold Time Enable Cycle Time Read Data Delay Time Read Data Hold Time Symbol Min. Max. Table-5 Unit tAS tAH tr tf PWEH PWEL tDS tDH tCYCLE tDD tDHR 20 10 − − 230 230 80 10 500 − 5 − − 15 15 − − − − − 160 − ns ns ns ns ns ns ns ns ns ns ns Note: All timing is specified using 20% and 80% of Vcc as the reference points. PAGE: 2/19 M0220SD-202SDAR1 RS tAS tAH R/W tr tf PWEH E PWEL tDS tDH DB0-DB7 tCYCLE Fig. 1. Motorola M68-Type Parallel Interface Write Cycle Timing RS tAS tAH R/W tr tf PWEH E PWEL tDD tDHR DB0-DB7 tCYCLE Fig. 2. Motorola M68-Type Parallel Interface Read Cycle Timing PAGE: 3/19 M0220SD-202SDAR1 2-5-2. INTEL I80-TYPE PARALLEL INTERFACE TIMING (See Fig. 3 and 4) Item Symbol tRSS tRSH tf tr tWRL tWRH tDSi tDHi tCYCWR tCYCRD tRDL tRDH tDDi tDHRi RS Setup Time RS Hold Time Input Signal Fall Time Input Signal Rise Time WR/ Pulse Width Low WR/ Pulse Width High Write Data Setup Time Write Data Hold Time WR/ Cycle Time RD/Cycle Time RD/ Pulse Width Low RD/ Pulse Width High Read Data Delay Time Read Data Hold Time Min. 10 10 − − 30 100 30 10 166 166 70 70 − 5 Max. − − 15 15 − − − − − − − − 70 50 Table-6 Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns Note: All timing is specified using 20% and 80% of Vcc as the reference points. RS tRSS tr tf tRSH tWRH WR/ tWRL tOHi tDSi DB0-DB7 tCYCWR Fig. 3. Intel I80-Type Parallel Interface Write Cycle Timing PAGE: 4/19 M0220SD-202SDAR1 RS tRSS tr tf tRSH tRDH RD/ tRDL tDDi tDHRi DB0-DB7 tCYCRD Fig. 4. Intel I80-Type Parallel Interface Read Cycle Timing 2-5-3. SYNCHRONOUS SERIAL INTERFACE TIMING (See Fig. 5, 6, 10, and 11) Item STB Setup Time STB Hold Time Input Signal Fall Time Input Signal Rise Time STB Pulse Width High SCK Pulse Width High SCK Pulse Width Low SI Data Setup Time SI Data Hold Time SCK Cycle Time SCK Wait Time Between Bytes SO Data Delay Time SO Data Hold Time Symbol tSTBS tSTBH tf tr tWSTB tSCKH tSCKL tDSs tDHs tCYCSCK tWAIT tDDs tDHRs Min. 100 500 − − 500 200 200 100 100 500 1 − 5 Max. − − 15 15 − − − − − − − 150 − Table-7 Unit ns ns ns ns ns ns ns ns ns ns us ns ns Note: All timing is specified using 20% and 80% of Vcc as the reference points. PAGE: 5/19 M0220SD-202SDAR1 tWSTB STB tCYCSCK tSTBS tSTBH tSCKH SCK tf tSCKL tDHs tr tDSs SI Fig. 5. Synchronous Serial Interface Write Cycle Timing tWSTB STB tCYCSCK tSTBS tSTBH tSCKH SCK tf tSCKL tDHs tr tDDs SI/SO Fig. 6. Synchronous Serial Interface Read Cycle Timing PAGE: 6/19 M0220SD-202SDAR1 2-5-4. RESET TIMING (See Fig. 7) Item Delay Time After Reset Vcc Off Time RST/ Pulse Width Low Symbol tBSTD tOFF tRSTL Min. 100 1 500 Max. − − − Table-8 Unit us ms ns 4.5V Vcc 0.2V tOFF tRSTD RS, STB Fig. 7. Power-Up Internal Reset Timing 3. MODE OF OPERATION The following modes of operation are selectable via jumpers (see section 6. jumper Settings). 3-1. PARALLEL INTERFACE MODES In the parallel interface mode, 8-bit instructions and data are sent between the host and the module using either 4-bit nibbles or 8-bit bytes. Nibbles are transmitted high nibble first on DB4-DB7 (DB0-DB3 are ignored) whereas bytes are transmitted on DB0-DB7. The Register Select (RS) control signal is used to identify DB0-DB7 as an instruction (low) or data (high). 3-1-1. MOTOROLA M68-TYPE MODE This mode uses the Read/Write (R/W) and Enable (E) control signals to transfer information. Instructions/data are written to the module on the falling edge of E when R/W is low and are read from the module after the rising edge of E when R/W is high. RS R/W E DB7 IB7 IB3 IB7 IB3 BF= “0” IB3 IB7 IB3 DB6 IB6 IB2 IB6 IB2 IB6 IB2 IB6 IB2 DB5 IB5 IB1 IB5 IB1 IB5 IB1 IB5 IB1 DB4 IB4 IB0 IB4 IB0 IB4 IB0 IB4 IB0 Write Instruction Write Instruction Read Instruction Write Data Fig. 8. Typical 4-Bit Interface Sequence Using M68-Type Mode PAGE:7/19 M0220SD-202SDAR1 3-1-2. INTEL I80-TYPE MODE This mode uses the Read (RD/) and Write (WR/) control signals to transfer information. Instructions/data are written to the module on the rising edge of WR/ and are read from the module after the falling edge of RD/. RS WR/ RD/ DB7 IB7 IB7 BF=“0” DB7 DB6 IB6 IB6 IB6 DB6 DB0 IB0 IB0 IB0 DB0 Write Instruction Write Instruction Read Instruction Write Data Fig. 9. Typical 8-Bit Parallel Interface Sequence Using I80-Type Mode 3-2. SYNCHRONOUS SERIAL INTERFACE MODE In the synchronous serial interface mode, instructions and data are sent between the host and the module using 8-bit bytes. Two bytes are required per read/write cycle and are transmitted MSB first. The start byte contains 5 high bits, the Read/Write (R/W) control bit, the Register Select (RS) control bit, and a low bit. The following byte contains the instruction/data bits. The R/W bit determines whether the cycle is a read (high) or a write (low) cycle. The RS bit is used to identify the second byte as an instruction (low) or data (high). This mode uses the Strobe (STB) control signal, Serial Clock (SCK) input, and Serial I/O (SI/SO) line to transfer information. In a write cycle, bits are clocked into the module on the rising edge of SCK. In a read cycle, bits in the start byte are clocked into the module on the rising edge of SCK. After the minimum wait time, each bit in the instruction/data byte can be read from the module after each falling edge of SCK. Each read/write cycle begins on the falling edge of STB and ends on the rising edge. To be a valid read/write cycle, the STB must go high at the end of the cycle. PAGE: 8/19 M0220SD-202SDAR1 STB 1 2 3 4 5 6 7 “1” “1” “1” “1” “1” R/W RS 8 9 10 11 12 13 14 15 16 “0” B7 B6 B5 B4 B3 B2 B1 B0 SCK SI/SO Start Byte Instruction / Data Fig. 10. Typical Synchronous Serial Interface Write Cycle STB 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 SCK SI/SO “1” “1” “1” “1” “1” R/W RS “0” Start Byte B7 B6 B5 B4 B3 B2 B1 B0 Instruction / Data Fig. 11. Typical Synchronous Serial Interface Read Cycle 3-3. RESET MODE The module is reset automatically at power-up by internal R-C circuit. However, an external reset mode can also be selected when using one of the parallel interface modes (this option is not available when using the synchronous serial interface mode) which allows the module to be reset by setting the Reset (RST/) input low. PAGE: 9/19 M0220SD-202SDAR1 4. FUNCTIONAL DESCRIPTION 4-1. ADDRESS COUNTER (AC) The AC stores the address of the data being written to and from DDRAM or CGRAM. The AC increments by 1 (overflows from 27H to 40H and from 67H to 00H) or decrements by 1 (underflows from 40H to 27H and from 00H to 67H) after each DDRAM access. The AC increments by 1 (overflows from 3FH to 00H) or decrements by 1 (underflows from 00H to 3FH) after each CGRAM access. When addressing DDRAM, the value in the AC also represents the cursor position. 4-2. DISPLAY DATA RAM (DDRAM) The DDRAM stores the character code of each character being displayed on the VFD. Valid DDRAM addresses are 00H to 27H and 40H to 67H. DDRAM not being used for display characters can be used as general purpose RAM. The tables below show the relationship between the DDRAM address and the character position on the VFD before and after a display shift (with the number of display lines set to 2). Relationship before a display shift (non-shifted): 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 2 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 Relationship after a display shift to the left: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 2 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54 Relationship after a display shift to the right: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 27 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 2 67 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 PAGE: 10/19 M0220SD-202SDAR1 4-3-1 CHARACTER GENERATOR RAM (CGRAM) The CGRAM stores the pixel information (1 = pixel on, 0 = pixel off) for the eight userdefinable 5x8 characters. Valid CGRAM addresses are 00H to 3FH. CGRAM not being used to define characters can be used as general purpose RAM (lower 5 bits only). Character codes 00H to 07H (or 08H to 0FH) are assigned to the user-definable characters (see section 5.0 Character Font Tables). The table below shows the relationship between the character codes, CGRAM addresses, and CGRAM data for each user-definable character. Character code D7 D6 D5 D4 D3 D2 D1 D0 0 0 0 0 X 0 0 0 0 0 0 0 0 0 0 0 X X 0 1 0 1 1 1 CGRAM address A5 A4 A3 A2 A1 A0 0 0 0 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 0 0 1 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 CGRAM data D7 D6 D5 D4 D3 D2 X X X 1 1 1 0 0 0 0 0 0 0 0 1 0 1 0 1 0 0 1 1 1 0 0 0 X X X 1 1 1 1 0 0 1 0 0 1 1 1 1 0 0 1 0 0 1 1 1 0 0 0 X X X 0 1 1 1 1 1 1 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 D1 1 0 1 0 0 0 1 0 1 0 0 1 0 0 1 0 D0 1 1 0 0 0 0 1 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0 1 0 CGRAM (1) CGRAM (2) CGRAM (8) x = don't care 4-3-2 INSTRUCTIONS Instruction RS Clear display 0 Cursor home 0 Entry mode set 0 Display on/off control 0 Cursor/display shift 0 Function set 0 CGRAM address set 0 DDRAM address set 0 Address counter read 0 DDRAM or CGRAM write 1 DDRAM or CGRAM read 1 x = don’t care R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 x 0 0 0 0 0 0 1 I/D S 0 0 0 0 0 1 D C B 0 0 0 0 1 S/C R/L x x 0 0 0 1 DL N x BR1 BR0 0 0 1 CGRAM address 0 1 DDRAM address 1 BF=0 AC contents 0 Write data 1 Read data PAGE: 11/19 M0220SD-202SDAR1 4-4-1. CLEAR DISPLAY RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 0 0 0 0 1 This instruction clears the display (without affecting the contents of CGRAM) by performing the following. 1) 2) 3) 4) Fills all DDRAM locations with character code 20H (character code for a space). Sets the AC to DDRAM address 00H (i.e. sets cursor position to 00H). Returns the display to the non-shifted position. Sets the I/D bit to 1. 4-4-2. CURSOR HOME RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 0 0 0 1 × ×=don’t care This instruction returns the cursor to the home position (without affecting the contents of DDRAM or CGRAM) by performing the following. 1) Sets the AC to DDRAM address 00H (i.e. sets cursor position to 00H). 2) Returns the display to the non-shifted position. 4-4-3. ENTRY MODE SET RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 0 0 1 I/D S This instruction selects whether the AC (cursor position) increments or decrements after each DDRAM or CGRAM access and determines the direction the information on the display shifts after each DDRAM write. The instruction also enables or disables display shifts after each DDRAM write (information on the display does not shift after a DDRAM read or CGRAM access). DDRAM, CGRAM, and AC contents are not affected by this instruction. I/D = 0 : The AC decrements after each DDRAM or CGRAM access. If S=1, the information on the display shifts to the right by one character position after each DDRAM write. I/D = 1 : The AC increments after each DDRAM or CGRAM access. If S=1, the information on the display shifts to the left by one character position after each DDRAM write. S = 0 : The display shift function is disabled. S = 1 : The display shift function is enabled. PAGE: 12/19 M0220SD-202SDAR1 4-4-4. DISPLAY ON/OFF CONTROL RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 0 1 D C B This instruction selects whether the display and cursor are on or off and selects whether or not the character at the current cursor position blinks. DDRAM, CGRAM, and AC contents are not affected by this instruction. D = 0 : The display is off (display blank). D = 1 : The display is on (contents of DDRAM displayed). C = 0 : The cursor is off. C = 1 : The cursor is on (8th row of pixels). B = 0 : The blinking character function is disabled. B = 1 : The blinking character function is enabled (a character with all pixels on will alternate with the character displayed at the current cursor position at about a 1Hz rate with a 50% duty cycle). 4-4-5. CURSOR/DISPLAY SHIFT RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 1 S/C R/L × × ×=don’t care This instruction increments or decrements the AC (cursor position) and shifts the information on the display one character position to the left or right without accessing DDRAM or CGRAM. DDRAM and CGRAM contents are not affected by this instruction. If the AC was addressing CGRAM prior to this instruction, the AC will be addressing DDRAM after this instruction. However, if the AC was addressing DDRAM prior this instruction, the AC will still be addressing DDRAM after this instruction. Table-10 S/C R/L AC Contents (cursor position) Information on the display 0 0 Decrements by one No change 0 1 Increments by one No change 1 0 Decrements by one Shifts on character position to the left 1 1 Increments by one Shifts on character position to the right PAGE: 13/19 M0220SD-202SDAR1 4-4-6. FUNCTION SET RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 1 DL N × BR1 BR0 ×=don’t care This instruction sets the width of the data bus for the parallel interface modes, the number of display lines, and the luminance level (brightness) of the VFD. DDRAM, CGRAM, and AC contents are not affected by this instruction. DL = 0 : Sets the data bus width for the parallel interface modes to 4-bit (DB7-DB4). DL = 1 : Sets the data bus width for the parallel interface modes to 8-bit (DB7-DB0). N = 0 : Sets the number of display lines to 1 (this setting is not recommended). N = 1 : Sets the number of display lines to 2 BR1, BR0 = 0,0: 0,1: 1,0: 1,1: Sets the luminance level to 100%. Sets the luminance level to 75%. Sets the luminance level to 50%. Sets the luminance level to 25%. 4-4-7. CGRAM ADDRESS SET RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 1 CG RAM Address This instruction places the 6-bit CGRAM address specified by DB5-DB0 into the AC (cursor position). Subsequent data writes (reads) will be to (from) CGRAM. DDRAM and CGRAM contents are not affected by this instruction. 4-4-8. DDRAM ADDRESS SET RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 1 DD RAM Address This instruction places the 7-bit DDRAM address specified by DB6-DB0 into the AC (cursor position). Subsequent data writes (reads) will be to (from) DDRAM. DDRAM and CGRAM contents are not affected by this instruction. 4-4-9. ADDRESS COUNTER READ RS 0 R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 1 BF=0 AC Contents This instruction reads the current 7-bit address from the AC on DB6-DB0 and the busy flag (BF) bit (always 0) on DB7. DDRAM, CGRAM, and AC contents are not affected by this instruction. Because the BF is always 0, the host never has to read the BF bit to determine if the module is busy before sending data or instructions. Therefore, data and instructions can be sent to the module continuously according to the E, WR/, and SCK cycle times specified in section 2.5 AC Timing Specifications. Due to this feature, the execution times for each instruction are not specified. PAGE: 14/19 M0220SD-202SDAR1 4-4-10. DDRAM OR CGRAM WRITE RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 1 0 Write data This instruction writes the 8-bit data byte on DB7-DB0 into the DDRAM or CGRAM location addressed by the AC. The most recent DDRAM or CGRAM Address Set instruction determines whether the write is to DDRAM or CGRAM. This instruction also increments or decrements the AC and shifts the display according to the I/D and S bits set by the Entry Mode Set instruction. 4-4-11. DDRAM OR CGRAM READ RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 1 1 Read data This instruction reads the 8-bit data byte from the DDRAM or CGRAM location addressed by the AC on DB7-DB0. The most recent DDRAM or CGRAM Address Set instruction determines whether the read is from DDRAM or CGRAM. This instruction also increments or decrements the AC and shifts the display according to the I/D and S bits set by the Entry Mode Set instruction. Before sending this instruction, a DDRAM or CGRAM Address Set instruction should be executed to set the AC to the desired DDRAM or CGRAM address to be read. 4-5. RESET CONDITIONS After a power-up reset, the module initializes to the following conditions: 1) All DDRAM locations are set to 20H (character code for a space). 2) The AC is set to DDRAM address 00H (i.e. sets cursor position to 00H). 3) The relationship between DDRAM addresses and character positions on the VFD is set to the non-shifted position. 4) Entry Mode Set instruction bits: I/D = 1: The AC increments after each DDRAM or CGRAM access. If S=1, the information on the display shifts to the left by one character position after each DDRAM write. S = 0: The display shift function is disabled. 5) Display On/Off Control instruction bits: D = 0: The display is off (display blank). C = 0: The cursor is off. B = 0: The blinking character function is disabled. 6) Function Set instruction bits: DL = 1: Sets the data bus width for the parallel interface modes to 8-bit (DB7-DB0). N = 1: Number of display lines set to 2. BR1,BR0=0,0: Sets the luminance level to 100%. PAGE: 15/19 M0220SD-202SDAR1 5. CONNECTOR INTERFACE Pin No. 1 3 Serial GND Parallel (Intel) GND SI/SO 5 NC 7 NC 9 NC 11 NC 13 NC NC = No Connection Parallel Pin (Motorola) No. GND 2 Table-11 Parallel (Motorola) Vcc Vcc Parallel (Intel) Vcc 4 STB RS RS 6 8 10 12 14 SCK NC NC NC NC RD/ DB1 DB3 DB5 DB7 E DB1 DB3 DB5 DB7 J4 shorted shorted open J5 open open shorted NC/RST NC/RST WR/ DB0 DB2 DB4 DB6 R/W DB0 DB2 DB4 DB6 Serial 6. JUMPER SETTING Mode Parallel (Motorola) Parallel (Intel) Serial J3 open open shorted J6 shorted open shorted Table-12 J7 open shorted open Note : JP3∼JP7 must be set as shown above for either one of the parallel modes or for the serial mode. When the module is shipped , the parallel (Motorola) mode is set. JP2 must be shorted to allow external reset VFM202SDA1 using Parallel Transfer mode. Jumper setting:J6 shorted and J2,J3,J5,J7 open. VFM202SDA1-S using Serial Data Transfer mode. Jumper setting:J3,J5,J6 shorted and J2,J7 open Pin NO. 1,2,3,4,5 using a linker connected. 7. CIRCUIT BLOCK DIAGRAM NC_SI/SO RS_STB DOT MATRIX VACUUM VFD FLUORESCENT E_RD/_SCK CONTROLLER DISPLAY DB0-DB7 AND DRIVER R/W_WR/ Storage Humidity Hstg 20 90 Vcc DC-DC/AC GND CONVERTER PAGE: 16/19 25-2001FN %RH Without condensation M0220SD-202SDAR1 MECHANICAL DRAWING FIGURE-1 PAGE: 17/19 M0220SD-202SDAR1 CHARACTER FONT TABLES FIGUER-2 UPPER NIBBLE 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 LOWER NIBBLE 0000 CG RAM (1) 0001 CG RAM (2) 0010 CG RAM (3) 0011 CG RAM (4) 0100 CG RAM (5) 0101 CG RAM (6) 0110 CG RAM (7) 0111 CG RAM (8) 1000 CG RAM (1) 1001 CG RAM (2) 1010 CG RAM (3) 1011 CG RAM (4) 1100 CG RAM (5) 1101 CG RAM (6) 1110 CG RAM (7) 1111 CG RAM (8) PAGE:18/19 M0220SD-202SDAR1 8. WARRANTY This display module is guaranteed for 1 year after a shipment from Newhaven Display. 9. OPERATING RECOMMENDATION 9-1. Since VFDs are made of glass material. Avoid applying excessive shock or vibration beyond the specification for the module. Careful handing is essential. 9-2. Applying lower voltage than the specified may cause non activation for selected pixels. Conversely, higher voltage may cause may non-selected pixel to be activated. If such a phenomenon is observed, check the voltage level of the power supply. 9-3. Avoid plugging or unplugging the interface connection with the power on. 9-4. If the start up time of the supply voltage is slow, the controller may not be reset. The supply voltage must be risen up to the specified voltage level within 30msec. 9-5. Avoid using the module where excessive noise interference is expected. Noise affects the interface signal and causes improper operation. Keep the length of the interface cable less than 50cm (When the longer cable is required, please contact Newhaven Display engineering). 9-6. When power supply is turned off, the capacitor does not discharge immediately. The high voltage applied to the VFD must not contact the controller IC. (The shorting of the mounted components within 30 seconds after power off may cause damage.) 9-7. The fuse is mounted on the module as circuit protection. If the fuse blown, the problem shall be solved first and change the fuse. 9-8. When fixed pattern is displayed for long time, you may see uneven luminance. It is recommended to change the display patterns sometimes in order to keep best display quality. REMARKS This specification is subject to change without prior notice in order to improve the design and quality. Your consultation with Newhaven Display sales office is recommended for the use of this module. PAGE: 19/19 M0220SD-202SDAR1