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LC723740 Arkusz danych(PDF) 7 Page - Sanyo Semicon Device |
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LC723740 Arkusz danych(HTML) 7 Page - Sanyo Semicon Device |
7 / 14 page Test Circuits No. 5931-7/14 LC723732/40/48/56/64 Note: Ports PB through PG, and PJ through PT are all left open. However, ports PB through PG, PK through PT, EO3, and SUBPD are left open in output mode. Note: Ports PA through PT are all left open. Figure 1 IDD2 in Halt Mode Figure 2 IDD3 and IDD4 in Backup Mode Pin Descriptions Pin No. Symbol I/O Function Equivalent circuit Dedicated input ports. These ports are designed with a low threshold voltage. The pull-down resistors for all four pins are set up together with an IOS1 instruction. The pull-down resistors cannot be set individually. Input is disabled in backup mode. 32 31 30 29 PA0 PA1 PA2 PA3 I General-purpose I/O ports The mode (input or output) is set using the IOS2 instruction. Input is disabled and the pins go to the high-impedance state in backup mode. These ports are set up as general-purpose input ports after a power on reset. 28 27 26 25 PB0 PB1 PB2 PB3 I/O General-purpose I/O ports (high-voltage input and output) The mode (input or output) is set using the IOS2 instruction. External pull-up resistors are required since the output circuits are open drain circuits. Input is disabled and the pins go to the high-impedance state in backup mode. These ports are set up as general-purpose input ports after a power on reset. 24 23 22 21 PC0 PC1 PC2 PC3 I/O General-purpose I/O and external interrupt shared function ports The input formats are Schmitt inputs. The external interrupt function is enabled when the external interrupt enable flag is set. • When used as general-purpose I/O ports: The mode (input or output) is set in 1-bit units using the IOS2 instruction. • When used as external interrupt pins: The external interrupt functions are enabled by setting the corresponding external interrupt enable flag (INT4EN or INT5EN). Here, the pins must be set to input mode in advance. Input is disabled and the pins go to the high-impedance state in backup mode. These ports are set up as general-purpose input ports after a power on reset. 20 19 18 17 PD0/INT4 PD1/INT5 PD2 PD3 I/O Continued on next page. |
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