Analog Integrated Circuit Device Data

32

Freescale Semiconductor

908E624

TYPICAL APPLICATIONS

PCB Level Programming

If the IC is soldered onto the PCB board it is typically not

possible to separately power the MCU with +5.0 V, the whole

Figure 19).

Figure 19. Normal Monitor Mode Circuit

Table 14 summarizes the possible configurations and the

necessary setups.

MM908E624

RST_A

RST

IRQ_A

IRQ

VREFL

VDDA

EVDD

VDD

EVSS

AGND

VSUP[1:2]

GND

4.7µF

100nF

PTC4/OSC1

PTB3/AD3

PTB4/AD4

PTA0/KBD0

PTA1/KBD1

WDCONF

MAX232

10k

RS232

DB-9

1

3

C1+

C1-

4

5

C2+

C2-

7

8

2

3

5

GND

16

15

2

V+

V-

6

1µF

+

1µF

+

+

1µF

1µF

+

+

1µF

2

1

3

65

4

74HC125

74HC125

9.8304MHz CLOCK

DATA

CLK

10k

10k

10k

47µF

+

100nF

10

9

2.2k

VREFH

VSSA

Table 14. Monitor Mode Signal Requirements and Options

Mode

IRQ RST WDCONF

Reset

Vector

Serial

Communication

Mode

Selection

ICG

COP

Normal

Request

Timeout

Communication Speed

PTA0

PTA1

PTB3

PTB4

External

Clock

Bus

Frequenc

y

Baud

Rate

Normal

Monitor

GND

X

1

0

0

1

OFF

disabled

disabled

9.8304

MHz

2.4576

MHz

9600

Forced

Monitor

GND

$FFFF

(blank)

10

X

X

OFF

disabled

disabled

9.8304

MHz

2.4576

MHz

9600

GND

ON

disabled

disabled

—

Nominal

1.6MHz

Nominal

6300

User

not $FFFF

(not blank)

X

X

X

X

ON

enabled

enabled

—

Nominal

1.6MHz

Nominal

6300

Notes

32.

33.

External clock is a 4.9152 MHz, 9.8304 MHz or 19.6608 MHz canned oscillator on OCS1.

34.

Communication speed with external clock is depending on external clock value. Baud rate is bus frequency / 256.

35.

X = don’t care.

36.