ST52T400 datasheet(23/94 Pages) STMICROELECTRONICS

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ST52T400/T440/E440/T441

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2.2.3 Configuration Registers.

The ST52x400/440/441 Configuration Registers

allow the configuration of all the blocks of the ICU.

Table 2.2 describes the functions and the related

peripherals of the 21 Configuration Registers

available: in order to simplify the concept a mne-

monic name is assigned to each Configuration

FIVETM development tools. By using the load

instructions the Configuration Registers may be

set by using values stored in the Program Memory

(EPROM) or in the RAM.

The assembler instruction

LDCE conf,mem loads

the Configuration Register

conf with the contents

of memory location

mem, inside the currently set

memory page.

The assembler instructions

LDCR conf,reg loads

the Configuration Register

conf with the contents

of the register (RAM location)

reg.

Use and meaning of each register will be

described in further details in the corresponding

section.

2.2.4 Output Registers.

The Output Registers (OR) consist of 6 registers

containing data for the ICU peripherals including I/

OPorts.

All registers can be specified by using a decimal

address, e.g. 1 identifies the second OR.

By using the LOAD type instructions the Output

Registers (OR) may be set with values stored in

the Program Memory (LDPE) or in the RAM

(LDPR).

The assembler instruction

LDPE out,mem loads

the Output Register

out with the contents of mem-

ory location

mem, inside the currently set memory

page. The assembler instruction

LDPR out,reg

loads the Output Register out with the contents of

reg.

Table 2.3 describes the OR: in order to simplify the

concept a mnemonic name is assigned to each of

the Output Registers. The same name is used in

VISUAL FIVETM development tools. Use and

meaning of each register will be described in fur-

ther details in the corresponding section.

Table 2.1 Input Registers

IR MNEMONIC NAME

PERIPHERAL REGISTER

ADDRESS

STACK_POINTER

STACK POINTER

AC_CHAN0H(*)

Analog Comparator CHANNEL 0 High Byte

AC_CHAN0L(*)

Analog Comparator CHANNEL 0 Low Byte

AC_CHAN1H(*)

Analog Comparator CHANNEL 1 High Byte

AC_CHAN1L(*)

Analog Comparator CHANNEL 1 Low Byte

AC_CHAN2H(*)

Analog Comparator CHANNEL 2 High Byte

AC_CHAN2L(*)

Analog Comparator CHANNEL 2 Low Byte

AC_CHAN3H(*)

Analog Comparator CHANNEL 3 High Byte

AC_CHAN3L(*)

Analog Comparator CHANNEL 3 Low Byte

AC_CHAN4H (*)(**)

Analog Comparator CHANNEL 4 High Byte

AC_CHAN4L (*)(**)

Analog Comparator CHANNEL 4 Low Byte

AC_CHAN5H (*)(**)

Analog Comparator CHANNEL 5 High Byte

AC_CHAN5L (*)(**)

Analog Comparator CHANNEL 5 Low Byte

AC_STATUS(*)

Analog Comparator Status Register

PORT_A

PORT A INPUT REGISTER

PORT_B

PORT B INPUT REGISTER

PORT_C (**)

PORT C INPUT REGISTER

TRIAC_COUNT

TRIAC DRIVER COUNTER Value

PWM_COUNT

PWM/TIMER COUNTER Value

PWM_STATUS

TIMER STATUS REGISTER

(*) Not used on ST52x400xx versions

(**) Not used on ST52x400F/440F441F versions

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