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ST10F166BQ1-16 Datasheet(PDF) 6 Page - STMicroelectronics |
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ST10F166BQ1-16 Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 62 page 6/62 ST10F166 NMI 29 I Non-Maskable Interrupt Input. A high to low transition at this pin causes the CPU to vector to the NMI trap routine. When the PWRDN (power down) instruction is executed, the NMI pin must be low in order to force the ST10R165 to go into power down mode. If NMI is high, when PWRDN is executed, the part will con- tinue to run in normal mode. If not used, pull NMI high externally. ALE 25 O Address Latch Enable Output. Can be used for latching the ad- dress into external memory or an address latch in the multiplexed bus modes. RD 26 O External Memory Read Strobe. RD is activated for every external instruction or data read access. P1.0 – P1.15 30 - 37 40 - 47 I/O Port 1 is a 16-bit bidirectional I/O port. It is bit-wise programmable for input or output via direction bits. For a pin configured as input, the output driver is put into high-impedance state. Port 1 is used as the 16-bit address bus (A) in demultiplexed bus modes and also after switching from a demultiplexed bus mode to a multi- plexed bus mode.. P5.0 – P5.9 48 – 53 56 – 59 I I Port 5 is a 10-bit input-only port with Schmitt-Trigger characteris- tics. The pins of Port 5 also serve as the (up to 10) analog input channels for the A/D converter, where P5.x equals ANx (Analog input channel x) for ST10F166 & ST10F166-16. P2.0 – P2.15 62 – 77 62 ... 75 76 77 I/O I/O I/O O I/O O I/O I Port 2 is a 16-bit bidirectional I/O port. It is bit-wise programmable for input or output via direction bits. For a pin configured as input, the output driver is put into high-impedance state. The following Port 2 pins also serve for alternate functions: P2.0CC0IOCAPCOM: CC0 Cap.-In/Comp.Out ... ... ... P2.13CC13IOCAPCOM: CC13 Cap.-In/Comp.Out, BREQExternal Bus Request Output P2.14CC14IOCAPCOM: CC14 Cap.-In/Comp.Out, HLDAExternal Bus Hold Acknowl. Output P2.15CC15IOCAPCOM: CC15 Cap.-In/Comp.Out, HOLDExternal Bus Hold Request Input Symbol Pin Number Input (I) Output (O) Function Table 1. Pin Definition and Function |
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