Keil MCB167-NET, User Manual

Page: 10 / 31

10 Chapter 2. Setup
CSSEL: Default ON ON
The CSSEL switches define the number of active chip select signals. The CS/
signals are generated on Port 6 and are used as chip select lines for the RAM,
Flash ROM and Ethernet devices on the MCB167-NET board.
10 9 Segment Address Lines Note
OFF OFF Five: CS4/…CS0/ gives two additional user CS lines.
OFF ON None Port 6 pins are free; requires board
modification
ON OFF Two: CS1/…CS0/
ON ON Three: CS2/...CS0/ default setting for the MCB167-NET Board
BTYP: Default OFF ON
The BTYP switches select the external bus type. The MCB167-NET board uses
an demultiplexed 16-bit address bus. Therefore the bus type cannot be changed
without extensive modification of the MCB167-NET hardware. The following
table lists the possible external bus types with the 167 CPU.
7 6 External Bus Note
OFF OFF 16-bit multiplexed BUS
OFF ON 16-bit demultiplexed BUS default setting for the MCB167-NET Board
ON OFF 8-bit multiplexed BUS
ON ON 8-bit demultiplexed BUS
BSL: Default ON
The BSL switch actives the on-chip bootstrap loader. The bootstrap loader
allows you to download the Monitor-166 for program debugging with µVision2.
This Monitor download is automatically performed when you start the µVision2
debugger. When
BSL is OFF you may use an Monitor program that is
programmed into the on-chip ROM of the C167 device.