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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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EF6805P2 датащи(PDF) 10 Page - STMicroelectronics |
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EF6805P2 датащи(HTML) 10 Page - STMicroelectronics |
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10 / 31 page  The A and X registers and all RAM locations except $07F and $07E are modified. ROM CHECKSUM SUBROUTINE - The ROM self- check is called at location $F95. The A register should be cleared before calling the routine. If any error is detected, it returns with the Z bit cleared ; otherwise Z = 1, X = 0 on return, and A is zero if the test passes. RAM location $040 to $043 is overwrit- ten. The checksum is the complement of the execu- tion OR of the contents of the user ROM. * This connection depends on clock oscillator user selectable mask option. Use jumper if the RC mask option is selected. Figure 11 : Self-check Connections. LED MEANINGS PC0 PC1 PC2 PC3 Remarks (1 : LED ON ; 0 : LED OFF) 1 0 1 0 0 0 0 1 1 0 1 1 0 0 0 0 0 0 0 0 Bad I/O Bad Timer Bad RAM Bad ROM Bad Interrupts or Request Flag All Flashing Good Device EF6805U3 10/31 |
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