New Micros NMIY-0031, Руководство пользователя

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2 / 2 6 / 2 0 0 2 2 : 0 6 P M 1 6
N M I Y - 0 0 3 1 C I R C U I T D E S C R I P T I O N
POWER
Standard boards require 250 mA of reg5 VDC at J12. Boards with the optional power
supply circuit installed require 6.3 to 10 VAC or +9 to +14 VDC at J2. The power supply option
has a bridge (CR1) and regulator (VR1) with input and output capacitors (C19 and C20) which
p5 VDC for board use.
PROCESSOR
The processor model for the NMIY-0031 is the 8031. The main features are:
•
8-bit CPU Optimized for Control
Applications
•
Extensive Boolean Processing (Single-
Bit Logic) Capabilities
•
32 Bi-directional and Individually
Addressable I/O Lines (4 8-bit ports)
•
128 Bytes of On-Chip Data RAM
•
Two 16-Bit Timer/Counters
•
5 Source Interrupt Structure with 2
Priority Levels
•
On-Chip Clock Oscillator
•
64K Program and Data Memory
Address Spaces
•
Full Duplex UART
•
Most instructions execute in < 1 uS
The 8031 uses three control lines for reads and writes. PSEN* is used for all program instruction
fetches. Data memory reads and writes use RD* and WD*. These signals provide separate
program and data spaces, as shown in 8031/8051 manufacturer’s data sheets.
Bus memory and control lines use three I/O ports. Eight I/O lines of the fourth port are
available for user definition. These eight lines are available directly from the processor at J5.
The NMIY-0031 uses an 11.0592 MHz crystal.
BOARD CONFIGURATION
Configuration is managed by jumper settings. Several configuration jumper groups adjust the
board to accommodate various memory options. Others set options for communications
standards and miscellaneous items. See
Jumpers
for configuration details.