101-0563【PDF 35/154 页】RCM3400 PROTO BOARD

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4.3 Serial Programming Cable

The programming cable is used to connect the serial programming port of the RCM3400

to a PC serial COM port. The programming cable converts the RS-232 voltage levels used

by the PC serial port to the CMOS voltage levels used by the Rabbit 3000.

When the PROG connector on the programming cable is connected to the programming

header on the RCM3400 Prototyping Board, programs can be downloaded and debugged

over the serial interface.

The DIAG connector of the programming cable may be used on header J2 of the RCM3400

Prototyping Board with the RCM3400 operating in the Run Mode. This allows the pro-

gramming port to be used as a regular serial port.

4.3.1 Changing Between Program Mode and Run Mode

The RCM3400 is automatically in Program Mode when the PROG connector on the pro-

gramming cable is attached, and is automatically in Run Mode when no programming

cable is attached. When the Rabbit 3000 is reset, the operating mode is determined by the

status of the SMODE pins. When the programming cable’s PROG connector is attached,

the SMODE pins are pulled high, placing the Rabbit 3000 in the Program Mode. When the

programming cable’s PROG connector is not attached, the SMODE pins are pulled low,

causing the Rabbit 3000 to operate in the Run Mode.

To

PC COM port

Programming

Cable

Colored

edge

C19

C21

BT1

PA0

PA2

PA1

PA3

C5

R10

U4

C28

Battery

L1

D1

D2

PA4

PA6

PA5

PA7

CX2

UX2

C7

C18

C22

C25

C30

R46

PB1

PB3

PB5

PB7

PC1

PC3

PC7

/IOWR

SMODE1

PB2

PB4

PB6

PC0

PC2

PC6

/IORD

STAT

SMD0

CX1

UX1

CX3

CX4

CX5

PG6

PG7

JP8

JP4

CX7

CX8

CX6

C26

U5

C23

CX9

CX10

CX11

C53

R39

R40

R41

R42

R62

C31

C32

R45

C33

C34

C35

R54

C41 C42

C46

R59

C49

Y1

C52

U10

HOT

C55

C54

C56

U12

+5 V

C61

DCIN

GND

+3.3 V

+5 V

PD0

PD5

PD4

PD6

RESET

C36

C37

C51

C59

U13

C60

PD7

PE1

PE4

PE6

PF0

PF4

PE0

PE2

PE5

PE7

PF1

PF5

U3

C59

C56

R21

C39

RP2

C53

C51

RP3

R67

RP4

C55

C50

JP3

R24

JP6

JP7

1

2

S1

+5 V

GND

+3.3 V

U7

U6

C50

GND GND

R64

PF6

PG0

PG2

PF7

PG1

PG3

C28

LCD1JA

PG4

PG6

/RES OUT

+3.3 V

VBAT

PG5

PG7

RESET IN

GND

+3.3 V

C13

R3

C19

C14

C1

R1

RESET

GND

GND

C1

IR1

C3

R13

R14

LCD1JB

LCD1JC

GND

RESET RCM3400 when changing mode:

JP1 JP2

Short out pins 1?32 on header J2, OR

Press RESET button (if using Prototyping Board), OR

Cycle power off/on

GND

GND

S2

S3

after removing or attaching programming cable.

+5 V

+5 V

R1

R2

R4

R5

R3

C4

R8

RCM3400

PROTOTYPING

BOARD

U1

J3 PD6 R47 PD7 R57

GND AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 THERM GND CNVRT VREF

GND

+5 V

1 1

DS1 DS2

PD5 PD4

2 2

+3.3 V +3.3 V

Figure 7. Switching Between Program Mode and Run Mode

User ’s Manual

29

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