Toshiba TOPAS900 user manual Jumper Description, Jumpers of the Programming-Debugging Board

Users Manual TOPAS900 Flash V2.1

flash software should be executed. If the jumper is left open, the /EA pin is pulled up by a 10k pull-up resistor and the Flash MCU boots from internal flash memory. When the MCU is reset with /EA at high level, the external memory can be accessed additionally. The entire ROM size would be 768 kb and 128 kb of ram. When the MCU is reset with /EA at low level, the internal flash memory cannot be accessed additionally.

5.2.Jumper Description

5.2.1. The jumpers of the Programming-Debugging Board

J_VCC : must only be opened when in-circuit debugging is performed with Flash Carrier Board plugged in to a PGA socket of a target application with its own power supply. In all other cases the jumper must be close to connect the power supply to the Flash Carrier Board.

J_RES : Jumper to connect/disconnect the reset line controller by the firmware controller. Should only be opened when in-circuit debugging is performed with a target application with its own reset generation circuit.

5.2.2. The jumpers of the Flash Carrier Board

J_CS0 : This jumper is to connect/disconnect the chip select line CS0 to the on-board RAM device. If an external data/address bus is not required, it is recommended to open this jumper. The CS0 pin can be used as a port pin additionally.

J_CS2 : Same as above. The CS2 pin is used to enable the on-board flash ROM device.

J_EA : Jumper to select between internal (high/open) and external flash memory access (low/closed) after reset. When the Flash Carrier Board is connected to the Programming and Debugging Board, the jumper can be left open – the line is controlled by the firmware controller.

5.3.Programming of Flash Memory

Internal and external flash memories can be programmed with the respective tool. To start it select the program group “TOPAS900 Flash” and select “TOPAS900 Flash Programming Tool” from the menu. If there is no board connected a respective error message will be displayed. If there is no physical connection this should be mounted. In a lot of cases the reason is the COM port setting. You can set the COM and the transfer data by clicking the “Setup Port” icon and use the setting options. If the connection is set

HWU Elektronik Oberhausen Page 34