Table 6. Led And Port Emulation Addresses; Table 7. Led Anode/Gpio Port A Output Control Register - ZiLOG eZ80F92 User Manual

eZ80F92 Development Kit
User Manual
24
Address
800000h
800001h
800002h

Table 7. LED Anode/GPIO Port A Output Control Register

Function
Anode Col 1
Anode Col 2
Anode Col 3
Operational Description
These functions are memory-mapped with an address decoder based on
the Generic Array Logic GAL22lV10D (U15) device manufactured by
Lattice Semiconductor, and a bidirectional latch (U16). Additionally, U15
is used to decode addresses for access to the 7x5 LED matrix.
Table 6 lists the memory map addresses to registers that allow access to
the above functions. The register at address
A Output Control and LED Anode register functions. The register at
address controls the register functions for the LED cathode,
800001h
modem reset, and user triggers. Address
data.

Table 6. LED and Port Emulation Addresses

Register Function
LED Anode/GPIO Port output control
LED Cathode/Modem/Trig
GPIO Data
Port A Emulation
GPIO Port A is emulated with the use of the GPIO Output Control Regis-
ter and the GPIO Data Register. If bit 7 in the GPIO Output Control Reg-
ister is 1, all of the lines on GPIO Port A are configured as input ports. If
this bit is 0, all of the lines on Port A are configured as output ports.
Table 7 lists the multiple functions of the register.
7
800002h
Bit #
6 5 4 3
PRELIMINARY
controls GPIO Port
800000h
controls GPIO Port A
Access
WR
WR
RD/WR
2 1 0
X
X
X
UM013904-0203