Micricomputer Systems MSI-P563, Руководство пользователя

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Page MSI-P563 User Manual
D. 82C54 Programmable Interval Timer
The 82C54 (U10) provides three 16-bit counters for timer/
counter operations via 10-pin connector J2. The jumpers used
for configuring the 82C54 are given Table 8. The pin assignments
for J2 are given in Table 9. Data sheets describing the 82C54
are available on the internet at
www.okisemi.com/public/nf/Intro-6100.html
Table 8. Jumpers for 82C54 configuration.
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Jumper Function Jumper Function
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JP4-1 GATE0 JP4-8 CLK2
JP4-2 CLK0 JP4-9 OUT2
JP4-3 OUT0 JP4-10 INVERT IN*
JP4-4 GATE1 JP4-11 SYSCLK**
JP4-5 CLK1 JP4-12 INVERT OUT*
JP4-6 OUT1 JP4-13 UART CLK***
JP4-7 GATE2 JP4-14 GND
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* Denotes a 74HCT14 inverter. Two other inverters are available using
solder pads A thru D (see schematic diagram of Appendix).
** SYSCLK is the PC/104 bus clock from pin B20.
*** UART CLK is a 1.8432 MHz clock.
Table 6. 82C54 connector J2 pin-outs.
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Pin No. Function Pin No. Function
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1 GATE0 6 OUT1
2 CLK0 7 GATE2
3 OUT0 8 CLK2
4 GATE1 9 OUT2
5 CLK1 10 GND
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9