Maxim Integrated DS4830 Optical Microcontroller - Manual (Page 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]--