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TC9327BFG 数据表(PDF) 8 Page - Toshiba Semiconductor |
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TC9327BFG 数据表(HTML) 8 Page - Toshiba Semiconductor |
8 / 71 page TC9327BFG 2005-04-20 8 Pin No. Symbol Pin Name Function and Operation Remarks 70 FMIN FM local oscillator signal input Using programmable counter input pins for FM, VHF band. The 1/2 + pulse swallow system (VHF mode) and the pulse swallow system (FM mode) are freely selectable by program. At the VHF mode, local oscillation output (VCO output) of 50 to 230 MHz [0.3 Vp-p (min)] is input, and at the FM mode, that of 40 to 130 MHz [0.2 Vp-p (min)] is input. A built-in input amp. and C coupling allow operation at low-level input. Note: When in the PLL OFF mode or when set to AMIN input, the input is pulled down. 71 AMIN AM local oscillator signal input Programmable counter input pin for AM band. The pulse swallow system (HF mode) and direct dividing system (LF mode) are freely selectable by program. At the HF mode, local oscillation output (VCO output) of 1 to 45 MHz [0.2 Vp-p (min)] is input, and at the LF mode, 0.5 to 12 MHz [0.2 Vp-p (min)] is input. Built-in input amp. operates with low-level input using a C coupling. Note: When in PLL OFF mode or when set to FMIN input, the input is pulled down. 73 RESET Reset input Input pin for system reset signals. RESET takes place while at low level; at high level, the program starts from address “0”. Normally, if more than 1.8 V is supplied to VDD when the voltage is 0, the system is reset (power on reset). Accordingly, this pin should be set to high level during operation. 74 XOUT 75 XIN 76 VXT Crystal oscillator pin Crystal oscillator pins. A reference 75-kHz crystal resonator is connected to the XIN and XOUT pins. The oscillator stops oscillating during CKSTP instruction execution. The VXT pin is the power supply for the crystal oscillator. A stabilizing capacitor (0.47 µF typ.) is connected. 77 VLCD 78 C1 79 C2 Voltage doubler boosting pin Voltage doubler boosting pin to drive the LCD. A capacitor (0.1 to 3.3 µF typ.) is connected to boost the voltage. The VLCD pin outputs voltage (3.1 V), which has been doubled from the constant voltage (VEE: 1.55 V) using the capacitor connected between C1 and C2. This potential is supplied to the LCD driver. If the internal VLCD OFF bit is set to “1” by program, an external supply can be input through the VLCD pin to drive the LCD. At this time, the VLCD/2 potential, whose VLCD voltage divided using resisters, is output from the C2 pin. |
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类似说明 - TC9327BFG |
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