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FEDL9488-01 Datasheet(PDF) 11 Page - LAPIS Semiconductor Co., Ltd. |
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FEDL9488-01 Datasheet(HTML) 11 Page - LAPIS Semiconductor Co., Ltd. |
11 / 31 page FEDL9488-01 ML9488 11/31 60-63 SYNCB I/O Input/output pin for common synchronization. It has a schmitt circuit. It becomes the synchronization signal output pin in the master mode (M/S pin = "H"). It becomes the synchronization signal input pin in the slave mode (M/S pin = "L"). For cascade connection, connect all of the involved ML9488s' SYNC pins by the common line. 65-66 I2C I Interface switching pin. It has a schmitt circuit. When this pin is "H", the interface is I 2C. When this pin is "L", the interface is three-wire serial. 20-21 DATA (SDA) I Display data input pin. It has a schmitt circuit. I2C="L": Serial interface; DATA Input the display data in the order of SEG80, SEG79, ... , SEG2, and SEG1. The display data turns on at "H" and turns off at "L". I2C="H": I 2C interface; SDA Input the display data in units of 8 bits. The display data turns on at "H" and turns off at "L". This pin has a built-in noise filter through which noises in widths up to 50 ns are removed. This noise filter is valid only when I2C = "H". 22-23 CLOCK (SCL) I Shift clock input pin for display data. It has a schmitt circuit. I2C="L": Serial interface; CLOCK The display data input to the DATA pin is serially input to the shift register at the CLOCK signal rise. I2C="H": I 2C interface; SCL The display data input to the SDA pin is serially input to the shift register at the SCL signal rise. This pin has a built-in noise filter through which noises in widths up to 50 ns are removed. This noise filter is valid only when I2C = "H". 24-25 LOAD I Input pin for the load signal of display data. It has a schmitt circuit. I2C="L": Serial interface; LOAD The display data in the shift register is transmitted as is to the segment driver for the "H" duration. When this pin is brought into "L", the shift register is disconnected from the segment driver. The display data in the shift register immediately before it become "L" is held in the data latch and transmitted to the segment driver. I2C="H": I 2C interface Use this pin as it is connected to GND. 17-19 SDAACK O I2C="L": Serial interface Use this pin as it is opened. I2C="H": I 2C interface The I 2C bus acknowledge output signal. Normally, use it as it is connected with the SDA pin. Connect an external pull-up resistor whenever necessary, as it is an open drain pin. The pull-up connection destination supply voltage shall be the VDD supply voltage or less. 69-70 POCEB I Internal POC circuit enable pin. It has a schmitt circuit. When this pin is "H", the POC circuit becomes OFF and the constant current (8µA) is cut. The RESETB pin pull-up resistor is cut as well. When this pin is "L", the POC circuit becomes ON. The RESETB pin is connected to a pull-up resistor. 44-45 RESETB *3 I Reset signal input pin for initializing inside the IC. It has a schmitt circuit. The "L" level enables the reset. This pin has an Internal pull-up resistor. When POCEB = "H", input the external reset signal to this pin. When POCEB = "L", the power-on reset operation is available by open this pin. |
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