Maxim-integrated DS4830 Optical Microcontroller Manual de usuario descargar pdf (Pagina 223)

DS4830 User’s Guide

223

25.3.1 – UROM_moveDP0

Function

UROM_moveDP0

Summary

Reads the byte/word value pointed to by DP[0].

Inputs

DP[0]: Address to read from data space (include 8000h offset if reading from flash).

Outputs

GR: Data byte/word read.

Destroys

None

Notes:

 Before calling this function, DPC should be set appropriately to configure DP[0] for byte or word mode.

 The address passed to this function should be based on the data memory mapping for the utility ROM, as shown

in Figure 25-1. When a byte mode address is used, CDA0 must be set appropriately to access either the upper or

lower half of program flash memory.

 This function automatically selects DP[0] as the data pointer before reading the byte/word value.

 Implemented as: move GR, @DP[0]

25.3.2 – UROM_moveDP0inc

Function

UROM_moveDP0inc

Summary

Reads the byte/word value pointed to by DP[0], then increments DP[0].

Inputs

DP[0]: Address to read from data space (include 8000h offset if reading from flash).

Outputs

GR: Data byte/word read.

DP[0] is incremented.

Destroys

None

Notes:

 Before calling this function, DPC should be set appropriately to configure DP[0] for byte or word mode.

 The address passed to this function should be based on the data memory mapping for the utility ROM, as shown

in Figure 25-1. When a byte mode address is used, CDA0 must be set appropriately to access either the upper or

lower half of program flash memory.

 This function automatically selects DP[0] as the data pointer before reading the byte/word value.

 Implemented as: move GR, @DP[0]++

25.3.3 – UROM_moveDP0dec

Function

UROM_moveDP0dec

Summary

Reads the byte/word value pointed to by DP[0], then decrements DP[0].

Inputs

DP[0]: Address to read from data space (include 8000h offset if reading from flash).

Outputs

GR: Data byte/word read.

DP[0] is decremented.

Destroys

None

Notes:

 Before calling this function, DPC should be set appropriately to configure DP[0] for byte or word mode.

 The address passed to this function should be based on the data memory mapping for the utility ROM, as shown

in Figure 25-1. When a byte mode address is used, CDA0 must be set appropriately to access either the upper or

lower half of program flash memory.

 This function automatically selects DP[0] as the data pointer before reading the byte/word value.

 Implemented as: move GR, @DP[0]--

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Maxim-integrated DS4830 Optical Microcontroller Manual de usuario Pagina 223

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