Equinox Systems GEMINI Guide de l'utilisateur télécharger pdf (Page 10)

User Guide V1.10

Device FLASH Code SRAM I/O Pins Vpp Programming

Size (Bytes) (Bytes) (Note 2) Mode Supported

P89C51RC+ 32K 512 32 +12V ISP

P89C51RD+ 64K 1K 32 +12V ISP

Device FLASH Code SRAM I/O Pins Vpp Programming

Size (Bytes) (Bytes) (Note 1) Mode Supported

P89C51RB2 16K 512 32 +5V ISP

P89C51RC2 32K 512 32 +5V ISP

P89C51RD2 64K 1K 32 +5V ISP

Device Support - Philips Microcontrollers

Philips FLASH 8051 Microcontroller Families

KEY: ISP = In-System Programming Mode

Note 1 - Vpp issues

The Gemini programmer outputs a continuous +5V Vpp to the PROG_VPP pin when a

P89CRx2 device is selected. If the target microcontroller ‘EA/Vpp pin is connected to the

target Vcc, the the PROG_VPP pin need not be connected at all.

Note 2 - Vpp issues

The Gemini programmer generates a +12V Vpp on-board the programmer for the

P89C51Rx+ devices and switches this voltage to the PROG_VPP pin during programming.

Note 3 - 6 Clock/12 Clock Oscillator Modes

The P89CRx2 microcontroller family are shipped from the factory with ‘6 Clock’ mode

enabled. This means that the device is configured to use 6 clocks per machine cycle i.e. twice

as fast as the generic 8051 core.

It is NOT possible to use the Gemini programmer to change the ‘6 Clock / 12 Clock’

selection. This operation can only be performed using the ‘Parallel Programming Algorithm’

which is available on the Equinox ‘Micro-Pro PLUS’ programmer.

Figure 1

Figure 2

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Equinox Systems GEMINI Guide de l'utilisateur Page 10