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UPD161622 Datasheet(PDF) 9 Page - NEC |
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UPD161622 Datasheet(HTML) 9 Page - NEC |
9 / 103 page Data Sheet S15649EJ2V0DS 9 µ PD161622 (2/2) Symbol Pin Name Pad No. I/O Function D0 to D5, D8 to D15, D6 (SCL), D7 (SI) Data bus (serial clock) (serial data input) 50 to 35 I/O These pins comprise 16-bit bi-directional data. When the serial interface has been selected (PSX = L), D7 functions as a serial data input pin (SI), D6 functions as a serial clock input pin (SCL). In either case, pins D0 to D7 and D8 to D15 are in high impedance mode. When the chip is not selected, D0 to D15 are in high impedance mode. RS Index register/, data/command selection 54 Input When parallel data transfer has been selected, this pin is usually connected to the least significant bit of the standard CPU address bus and is used to distinguish between data from index registers and data/commands. RS = H: Indicates that data from D0 to D15 is data/command RS = L: Indicates that data from D0 to D7 is index register contents Also, when serial data transfer is selected, the level of the RS pin is fetched at the rising edge of the eighth clock of the serial clock and whether the data is index register contents or data/command is distinguished. RS = H: Indicates that the data input to SI is data/command. RS = L: Indicates that the data input to SI is index register contents. IP0 to IP3 Input port 125, 127, 129, 131 Input This is a general-purpose input port. The status of these pins (H or L) can be read via a command. Because this is a CMOS input, do not leave open. OP0 to OP7 Output port 116 to 123 Output This is a general-purpose output port. The status of these pins (H or L) can be write via a command. Leave open when in unused. RSEL Oscillation signal select 28 Input This pin is for oscillation signal selection. When in used external resistance connection oscillator circuit, this pin set H. When in used internal oscillator circuit, this pin set L. RSEL = H: External resistance connection oscillator circuit select RSEL = L: CR internal oscillator circuit select OSCIN Oscillation signal 32 Input This pin is for oscillation signal input. RSEL = H: Connect 51 k Ω resistance between OSCIN and OSCOUT. RSEL = L: Leave open OSCOUT Oscillation signal 30 Output This pin is for oscillation signal input. RSEL = H: Connect 51 k Ω resistance between OSCIN and OSCOUT. RSEL = L: Leave open CSTB GSTB logic signal 34 Output This pin outputs STB signal for gate driver leveled by interface power supply voltage (VCC2). This output signal is reverse signal of GSTB. |
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