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CDP1851E Datasheet(PDF) 6 Page - Intersil Corporation |
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CDP1851E Datasheet(HTML) 6 Page - Intersil Corporation |
6 / 14 page 4-10 TABLE 1. (RA1 = 0, RA0 = 1) (NOTE 1) MODE SET 76543210 Input 0 0 X Set B Set A X 1 1 Output 0 1 X Set B Set A X 1 1 Bit-Programmable 1 1 X Set B Set A X 1 1 Bidirectional 1 0 X X Set A X 1 1 NOTE: 1. Modes should be set in order as shown in Table 1. If either port is set for bit-programmable mode, the two following control bytes should immediately follow: TABLE 2. (RA1 = 0, RA0 = 1) 76543210 Bit-Programming (Note 1) I/O7 I/O6 I/O5 I/O4 I/O3 I/O2 I/O1 I/O0 STROBE/RDY I/O Control (Notes 2 - 8) D7 D6 D5 D4 D3 D2 D1 D0 NOTES: 1. Output = 1, Input = 0 2. (D1) 0 = Port A, 1 = Port B 3. (D2) 0 = No change to RDY line function, 1 = Change per bit (D6) 4. (D3) 0 = No change to STROBE line function, 1 = Change per bit (D7) 5. (D4) RDY line output data 6. (D5) STROBE line output data 7. (D6) RDY line used as: Output = 1 Input = 0 8. (D7) STROBE line used as: Output = 1 Input = 0 If interrupts will be used for either bit-programmed port, the following control bytes should be loaded. TABLE 3. (RA1 = 0, RA0 = 1) INTERRUPT CONTROL 76543210 Logical Conditions and Mask 0 D6 D5 D4 D3 1 0 1 NOTES: 1. (D3) 0 = Port A, 1 = Port B 2. (D4) 0 = No change in mask, 1 = Mask follows (See Table 3A) 3. (D5)(D6) 0, 0 = NAND; 1, 0 = OR; 0, 1 = NOR; 1, 1 = AND TABLE 3A. (RA1 = 0, RA0 = 1) INTERRUPT CONTROL 76543210 Mask Register (If D4 = 1) B7 Mask B6 Mask B5 Mask B4 Mask B3 Mask B2 Mask B1 Mask B0 Mask NOTE: 1. If Bn Mask = 1 then mask Bit (for n = 0 to 7) CDP1851, CDP1851C |
Similar Part No. - CDP1851E |
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Similar Description - CDP1851E |
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