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MSM586 Datasheet(PDF) 7 Page - OKI electronic componets |
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MSM586 Datasheet(HTML) 7 Page - OKI electronic componets |
7 / 24 page 7/24 ¡ Semiconductor MSM66585/586/587/P587/Q587 PIN DESCRIPTIONS (Continued) Symbol Type Description P9_0P9_3/ A16-A19 P9_4-P9_7 I/O P10_0-P10_7 Port 10 is 8 input/output pins. Input or output can be specified for each bit with the Port 10 Mode Register (P10IO). Pull-up resistors can be specified for each bit with the Port 10 Pull-Up Register (P10PUP). After reset (by RES signal input, BRK instruction execution, or op code trap), P10 will be high-impedance inputs. I/O P12_0-P12_1 P12_2-P12_3/ INT2-INT3 P12_4-P12_7 I/O Port 9 is 8 input/output pins. Input or output can be specified for each bit with the Port 9 Mode Register (P9IO). Pull-up resistors can be specified for each bit with the Port 9 Pull-Up Register (P9PUP). P9_0-P9_3 also have a secondary function as output pins for internal operation. Their secondary function can be set for each bit with the Port 9 Secondary Function Control Register (P9SF). The input/output settings of P9IO will be ignored for pins that have been set to the secondary function by P9SF. A16-A19 (P9_0-P9_3): These pins function as output pins for address A16-A19 when accessing program memory or data memory that has been expanded externally. Note that program memory address A16-A19 will be output even when accessing data memory that has been expanded externally. When the EA pin is low and program memory that has been expanded externally is accessed, A16-A19 will be output regardless of P9SF settings. After reset (by RES signal input, BRK instruction execution, or op code trap), P9 will be high-impedance inputs. Port 12 is 8 input/output pins. Input or output can be specified for each bit with the Port 12 Mode Register (P12IO). P12_2 and P12_3 also have a secondary function as input pins for internal operation. Their secondary function can be set for each bit with the Port 12 Secondary Function Control Register (P12SF). The input/output settings of P12IO will be ignored for pins that have been set to the secondary function by P12SF. INT2 (P12_2), INT3 (P12_3): These pins input external interrupts 2 and 3. After reset (by RES signal input, BRK instruction execution, or op code trap), P12 will be high-impedance inputs. AI0-AI3 These are analog input pins for the A/D converter (test pins for MSM66585). I VREF This is the reference voltage pin for the A/D converter (VDD for MSM66585). I AGND This is the ground input pin for the A/D converter (GND for MSM66585). I OSC0 This pins connect to a crystal oscillator, ceramic oscillator, or capacitors for base clock oscillation. When the base clock is to be supplied externally, it should be input on the OSC0 pin with the OSC1 pin left open. I NMI This input pin requests a non-maskable interrupt. I RES This is an active-low reset input pin. I EA I VDD These are voltage pins. All VDD pins (9, 17, 37, 67, 93) should be connected to the supply voltage (for MSM66585 connect pins 9, 10, 17, 37, 67, 93). I GND These are ground pins. All GND pins (16, 40, 68, 94) should be connected to ground (for MSM66585 connect pins 11, 16, 40, 68, 94). I When this pin is high, program addresses 0H-FFFFH will access internal program memory and program addresses 10000H-FFFFFH will access external program memory. To access external program memory, P1, P5, and P9 must be set with their secondary function control registers. When this pin is low, all program addresses will access external program memory. OSC1 O |
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