ST40RA View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST40RA

32-bit Embedded SuperH Device

STMicroelectronics 

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5 System configuration

ST40RA

SYSCONF.SYS_CON2

[44:46] EMPI_CS_ENB

47 SEL_EXT_EMI_SLAVE

[48:59] Reserved

[60:63] PIO_CONF

Functional pin use and behavior

Enable EMPI chip selection alternate function

000: NOTESC0 remapped to NOTEMPICS

001: NOTESC1 remapped to NOTEMPICS

010: NOTESC2 remapped to NOTEMPICS

011: NOTESC3 remapped to NOTEMPICS

100: NOTESC4 remapped to NOTEMPICS

101: NOTESC5 remapped to NOTEMPICS

110: Reserved

111: Disabled (value at reset)

Select EMI slave or master functionality

0: EMI is bus master

1: EMI is bus slave

PIO_CONF

0x0018

RW

RW

RW

5.9.6

PIO alternate functions

The function of pads with PIO alternate functions are controlled by the PIO.PC0, PIO.PC1 and

PIO.PC2 registers.

In the ST40RA device, the operational modes for these registers differ from the standard

architecture definition and are shown in Table 12.

PIO bit configuration

PIO output state

PIO.PC2

NonPIO functiona

PIO bidirectional

PIO output

PIO bidirectional

PIO input

PIO input

Reserved

Reserved

-

0

Open drain

0

Push-pull

0

Open drain

0

High impedance

1

High impedance

1

-

1

-

1

Table 12: PIO alternate function registers

a. State following reset

PIO.PC1

0

0

1

1

0

0

1

1

PIO.PC0

0

1

0

1

0

1

0

1

29/94 STMicroelectronics

ADCS 7260755H

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