VSBC-335 32-bit Single Board Computer with two IP Modules slots
It gives an optimal balance of performance, integration and power consumption. The MC68340 is based on the powerful CPU-32 core which includes a full 32- bit central processor unit. The MC68340 can function at clockspeed up to 25 MHz.
Specifications
- High Performance 25 MHz MC68340 processor with CPU-32 core.
- High speed 16-bit dual-channel DMA controller.
- Dual RS232-D serial ports (RJ-45 connectors) up to 76,8 kbauds.
- Up to 512 KBytes on-socket EPROM, up to 2 MBytes SRAM and up to 2 MBytes Flash.
- Real time clock calendar with on-chip battery-backed SRAM
- Full dual IP module interface including DMA control.
- Software programmable Interrupt handler.
- Master processor to VME transfers: D08(E0) and D16 with the A16 or A24 addressing capabilities.
- Slot 1 SGL arbiter and bus timer with 64 ms time-out period
This CPU-32 is connected to all other internal modules through the 32-bit InterModule Bus (IMB). The System Integration Module (SIM) provides the external bus interface, which handles the transfer of information between the IMB and external memory or peripherals. Based on the MC68000 bus, the external bus provides up to 32 address lines and 16 data lines.
Furthermore, the MC68340 processor incorporates a high speed 32-bit dual channel Direct Memory Access (DMA) controller, which gives two advantages for the main peripherals: high speed transfer to and from the IP modules without heavy loading of the CPU, and avoidance of the need to block lower-priority (or all) interrupts while performing data transfers. The dual-address mode is used for the IP, it can also be used for other transfers (by example for a block between two memory spaces). Two serial channels are also included in the MC68340. They are full-duplex universal synchronous/ asynchronous receiver/transmitter (USART) and have RS-232D interfaces with RJ-45 connectors.
A clock synthesizer generates the clock signals used by all internal CPU operations. An external independent quartz oscillator provides clock for all peripheral interfaces, including the VME bus. Therefore, the CPU clock can be programmed at any frequency without affecting the peripheral timings. Two 16-bit timers are also available in the MC68340. Up to seven discrete interrupt inputs are available for external interrupt sources on the MC68340. They are used in vectored mode for the VME bus and the IP modules, and in autovectorized mode for the on-board peripherals. are full-duplex universal synchronous/asynchronous receiver/ transmitter (USART) and have RS-232D interfaces with RJ-45 connectors.
They are VME Bus VME Interface Interrupt Handler System Controller Master Control Address & Data Buffer I/O Interface I/O Interface RS-232D Interface 16-bit Internal Address & Data Bus Dual Serial Controller System Integration Module Dual DMA Controller MC68340 Central Processing Unit CPU32 IP module "A" Boot PROM up to 512 kB IP module Interface SRAM Up to 2 MB Flash Up to 2 MB IP module "B"used in vectored mode for the VME bus and the IP modules, and in autovectorized mode for the on-board peripherals. The VSBC-335 acts only as a master. The VME interface includes the jumper selectable functions: SLOT1, RESET IN, RESET OUT. The SLOT1 function is used to enable the arbiter, and the system clock driver. The SGL arbiter is the Single level 3, using the daisy-moving chain priority (/ BCLR signal is not driven). The IH (Interrupt Handler) function is software selectable. The IH[1:7] bits are used to enable the corresponding interrupt handler.
As a master board, the VSBC- 335 can drive either D16 or D08(EO) in A16 or A24 mode. The selection between the A16 and A24 address width is automatically done by accessing different spaces in the MC68340 memory map.
Actis Computer, 1601 East Sharon Drive, Phoenix, AZ 85022. Tel: 602-494-2931; Fax: 602-494-1333.