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M37512FCHP Datasheet(PDF) 3 Page - Renesas Technology Corp |
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M37512FCHP Datasheet(HTML) 3 Page - Renesas Technology Corp |
3 / 87 page Feb 18, 2005 page 3 of 85 REJ03B0122-0101 7512 Group PIN DESCRIPTION Functions Name Pin •Apply voltage of 2.5V to Vcc, and 0 V to Vss. •Apply voltage of 2.5V to AVcc, and 0 V to AVss, ADVss. •Reference voltage input pin for A/D converters. •This pin controls the operation mode of the chip. •Normally connected to VSS. •Reset input pin for active “L”. •Input and output pins for the clock generating circuit. •Connect a ceramic resonator or quartz-crystal oscillator between the XIN and XOUT pins to set the oscillation frequency. •When a high-speed RC oscillator is used, leave the XIN pin and XOUT pin open. •When an external clock is used, connect the clock source to the XIN pin and leave the XOUT pin open. •8-bit CMOS I/O port. •I/O direction register allows each pin to be individually programmed as either input or output. •CMOS compatible input level. •P00 to P07 are CMOS 3-state output structure, and P10 to P17 are N-channel open-drain structure. •P10 to P17 (8 bits) are enabled to output large current for LED drive. Power source Table 1 Pin description Function except a port function Analog power source Analog reference voltage CNVSS input Reset input Clock input Clock output • Serial I/O2 function pin I/O port P0 • A/D converter input pin / PWM output pin •Current integrator and over current detector input pins. •Connect the sense resistor. Normally connect the ISENS0 to GND. • A/D converter input pin • A/D converter input pin / Over current detector function pin • Sub-clock generating circuit I/O pins (connect a resonat or registor and capacitor) •8-bit CMOS I/O port. •I/O direction register allows each pin to be individually programmed as either input or output. •CMOS compatible input level, but P22 to P25 can be switched between CMOS compatible input level or SMBUS input level in the I2C-BUS interface function. •P20, P21, P26, P27: CMOS3-state output structure. •P22 to P25: N-channel open-drain structure. •6-bit CMOS I/O port with the same function as port P0. •CMOS compatible input level. •CMOS 3-state output structure. •6-bit CMOS I/O port with the same function as port P0. •CMOS compatible input level. •P40 to P42, P45 are CMOS 3-state output structure, and P43 and P44 are N-channel open-drain structure. I/O port P1 I/O port P2 I/O port P3 I/O port P4 Analog input pin VCC, VSS AVCC AVSS ADVSS ADVREF CNVSS RESET XIN XOUT P00/SIN2 P01/SOUT2 P02/SCLK2 P03/SRDY2 P04/AN8 P05/AN9 P06/CFETCNT/ AN10 P07/AN11/ PWM1 P10–P17 P20/XCOUT P21/XCIN P22/SDA1 P23/SCL1 P24/SDA2/RxD P25/SCL2/TxD P26/SCLK P27/CNTR0/ SRDY1 P30/AN0– P35/AN5 P40/CNTR1 P41/INT0 P42/INT1 P43/INT2/SCMP2 P44/INT3/PWM0 P45/DFETCNT ISENS0 ISENS1 • I2C-BUS interface function pins/ Serial I/O1 function pins • Serial I/O1 function pin • Serial I/O1 function pin/ Timer X function pin • I2C-BUS interface function pins • A/D converter input pin • Timer Y function pin • Interrupt input pins • Interrupt input pin/SCMP2 output pin • Interrupt input pin/PWM output pin • Over current detector function pin |
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