XC888LM datasheet(78/144 Pages) INFINEON

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XC886/888CLM

Functional Description

Data Sheet

V0.9, 2006-12

3.7.1

Module Reset Behavior

Table 22 lists the functions of the XC886/888 and the various reset types that affect

these functions. The symbol “■” signifies that the particular function is reset to its default

state.

3.7.2

Booting Scheme

When the XC886/888 is reset, it must identify the type of configuration with which to start

the different modes once the reset sequence is complete. Thus, boot configuration

information that is required for activation of special modes and conditions needs to be

applied by the external world through input pins. After power-on reset or hardware reset,

the pins MBC, TMS and P0.0 collectively select the different boot options. Table 23

shows the available boot options in the XC886/888.

Table 22

Effect of Reset on Device Functions

Module/

Function

Wake-Up

Reset

Watchdog

Reset

Hardware

Reset

Power-On

Reset

Brownout

Reset

CPU Core

■■■■■

Peripherals

■■■■■

On-Chip

Static RAM

Not affected,

Reliable

Not affected,

Reliable

Not affected,

Reliable

Affected, un-

reliable

Affected, un-

reliable

Oscillator,

PLL

■

Not affected ■■■

Port Pins

■■■■■

EVR

The voltage

regulator is

switched on

Not affected ■■■

FLASH

■■■■■

NMI

Disabled

■■■

Table 23

XC886/888 Boot Selection

MBC

TMS

P0.0

Type of Mode

PC Start Value

User Mode

1); on-chip OSC/PLL non-bypassed 0000

BSL Mode; on-chip OSC/PLL non-bypassed

0000

OCDS Mode; on-chip OSC/PLL non-

bypassed

0000

User (JTAG) Mode

3); on-chip OSC/PLL non-

bypassed (normal)

0000

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