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MPC89X53A Datasheet(PDF) 5 Page - Megawin Technology Co., Ltd |
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MPC89X53A Datasheet(HTML) 5 Page - Megawin Technology Co., Ltd |
5 / 38 page P3.5 (T1) P3.6 (/WR) P3.7 (/RD) 15 16 17 17 18 19 11 12 13 keep the port high. Port3 also serves other special functions of this device. P3.0 and P3.1 act as receiver and transceiver of the data for UART function block, Alias RXD and TXD. P3.2 and P3.3 also act as external interrupt sources, alias INT0 and INT1. P3.4 and P3.5 also act as event sources for timer0 and timer1 individually, alias T0 and T1. P3.6 also acts as write signal while access to external memory, alias /WR. P3.7 also acts as read signal while access to external memory, alias /RD. P4.0 P4.1 P4.2 (/INT3) P4.3 (/INT2) 23 34 1 12 17 28 39 6 BU Port4 is extended I/O ports such like Port1. It can be available only on 44L-PLCC and 44L-PQFP package. RESET 9 10 4 IS A high on this pin for at least two machine cycles will reset the device. ALE 30 33 27 O Output pulse for latching the low byte of address during accesses to external memory. /PSEN 29 32 26 O The read strobe to external program memory, low active. /EA 31 35 29 I EA must be kept at low to enable the device to fetch program code from external flash memory. An internal pull-up resistance has been embedded in this pin. XTAL1 19 21 15 I Input to the inverting oscillator amplifier. XTAL2 18 20 14 O Output from the inverting amplifier. VDD 40 44 38 P Power Supply VSS 20 22 16 G Ground MEGAWIN MPC89x53A Data Sheet 5 |
Similar Part No. - MPC89X53A |
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Similar Description - MPC89X53A |
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