Zilog EZ80190 Bedienungsanleitung PDF herunterladen (Seite 28)

eZ80190 Development Kit

User Manual

eZ80Acclaim! Development Platform UM014108-0810

Table 6 lists the memory map addresses to registers that allow access to the

above functions. The register at address

800000h

controls general-pur-

pose port output control and LED anode register functions. The register at

address

800001h

controls the register functions for the LED cathode,

modem reset, and user triggers. Address

800002h

controls general-pur-

pose port data.

General-Purpose Port

The general-purpose port is emulated with the use of the GPIO Output

Control Register and the GPIO Data Register. If bit 7 in the GPIO Output

Control Register is 1, all of the lines on the general-purpose port are con-

figured as inputs. If this bit is 0, all of the lines on the general-purpose

port are configured as outputs. Table 7 lists the multiple functions of the

Table 6. LED and Port Emulation Addresses

Address Register Function Access

800000h LED Anode/General-Purpose Port

Output Control

800001h LED Cathode/Modem/Trig WR

800002h General-Purpose Port Data RD/WR

Table 7. LED Anode/General-Purpose Port Output Control Register

Function

Bit #

76543210

Anode Col 1 X

Anode Col 2 X

Anode Col 3 X

Anode Col 4 X

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 86 87

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