Cypress Semiconductor CY8CNP102E Manual do Utilizador descarregar pdf (Página 2)

CE54939

August 9, 2011 Document No. 001-54939 Rev *C 2

UART

Parameter Value Comments

Rx Clock Out None Not used

Tx Clock Out None Not used

InvertRX Input

Normal

Do not invert Rx Input

Note The clock to the TX8 user module should be eight times the desired baud rate. The parameters Command Terminator, ParamDelimiter,

and IgoneCharsBelow are used by the high level UART API to process the commands received. When the UART receives the character set

as Command Terminator, the API reports through a flag that a valid command has been received. When the character set as ParamDelimiter

is encountered, the API understands that the characters that follow the ParamDelimiter are the next parameter in the command. The API

ignores any characters below the value set in IgonreCharsBelow value and does not store them in the command buffer.

Global Resources

Important Global Resources

Parameter Value Comments

CPU_Clock SysClk/2 Sets the CPU frequency to 12 MHz

VC3 Source SysClk/1 Set System Clock as the source for VC3

VC3 Divider 156 Divide 24 MHz system clock by 156 (effective baud rate is 19.2 kbps)

Note Leave all other global resources at their default.

Pin Configuration

Pin Select Drive Interrupt

P2 [7] GlobalOutEven_7 Strong DisableInt

P2 [5] GlobalInEven_5 High Z DisableInt

Hardware Connections

Figure 1.Schematic Diagram

MAX232, a RS232 transceiver, is used to translate the ±10 V RS232 signals to transistor-transistor logic (TTL) level signals of

the PSoC.

JP1 is a 9 pin female serial port connector is used to connect the project with a PC.

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