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HT49R50A-1 Datasheet(PDF) 4 Page - Holtek Semiconductor Inc |
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HT49R50A-1 Datasheet(HTML) 4 Page - Holtek Semiconductor Inc |
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4 / 45 page  Pin Description Pin Name I/O Options Description PA0/BZ PA1/BZ PA2 PA3/PFD PA4~PA7 I/O Wake-up Pull-high or None CMOS or NMOS PA0~PA7 constitute an 8-bit bidirectional input/output port with Schmitt trig- ger input capability. Each pin on port can be configured as wake-up input by options. PA0~PA3 can be configured as CMOS output or NMOS input/out- put with or without pull-high resistor by options. PA4~PA7 are always pull-high NMOS input/output. Of the eight bits, PA0~PA1 can be set as I/O pins or buzzer outputs by options. PA3 can be set as an I/O pin or as a PFD output also by options. PB0/INT0 PB1/INT1 PB2/TMR0 PB3/TMR1 PB4~PB7 I ¾ PB0~PB7 constitute an 8-bit Schmitt trigger input port. Each pin on port are with pull-high resistor. Of the eight bits, PB0 and PB1 can be set as input pins or as external interrupt control pins (INT0) and (INT1) respectively, by software application. PB2 and PB3 can be set as input pin or as timer/event counter input pin TMR0 and TMR1 also by software application. PC0~PC3 I/O Pull-high or None CMOS or NMOS PC0~PC3 constitute a 4-bit bidirectional input/output port with Schmitt trig- ger input capability. On the port, such can be configured as CMOS output or NMOS input/output with or without pull-high resistor by options. V2 I ¾ Voltage pump for HT49R50A-1/HT49C50-1. LCD power supply for HT49C50L. VLCD I ¾ LCD power supply for HT49R50A-1/HT49C50-1. Voltage pump for HT49C50L. V1, C1, C2 I ¾ Voltage pump COM0~COM2 COM3/SEG32 O 1/2, 1/3or1/4 Duty SEG32 can be set as a segment or as a common output driver for LCD panel by options. COM0~COM2 are outputs for LCD panel plate. SEG0~SEG31 O ¾ LCD driver outputs for LCD panel segments OSC1 OSC2 I O Crystal or RC OSC1 and OSC2 are connected to an RC network or a crystal (by options) for the internal system clock. In the case of RC operation, OSC2 is the out- put terminal for 1/4 system clock. The system clock may come from the RTC oscillator. If the system clock co- mes from RTCOSC, these two pins can be floating. OSC3 OSC4 I O RTC or System Clock Real time clock oscillators. OSC3 and OSC4 are connected to a 32768Hz crystal oscillator for timing purposes or to a system clock source (depend- ing on the options). No built-in capacitor RES I ¾ Schmitt trigger reset input, active low. VSS ¾¾ Negative power supply, ground VDD ¾¾ Positive power supply Absolute Maximum Ratings Supply Voltage..........................VSS -0.3V to VSS+6.0V* Supply Voltage ........................VSS -0.3V to VSS+2.5V** Storage Temperature ............................ -50°Cto125°C Input Voltage..............................VSS -0.3V to VDD+0.3V Operating Temperature ........................... -40°Cto85°C Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil- ity. ²*² For HT49R50A-1/HT49C50-1 ²**² For HT49C50L HT49R50A-1/HT49C50-1/HT49C50L Rev. 2.10 4 April 24, 2006 |
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