Maxim Integrated DS4830A Optical Microcontroller - Manual (Page 235)

DS4830A User’s Guide
235
25.3.6 – UROM_moveDP1dec
Function UROM_moveDP1dec
Summary Reads the byte/word value pointed to by DP[1], then decrements DP[1].
Inputs DP[1]: Address to read from data space (include 8000h offset if reading from flash).
Outputs GR: Data byte/word read. DP[1] is decremented.
Destroys None
Notes:
• Before calling this function, DPC should be set appropriately to configure DP[1] 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[1] as the data pointer before reading the byte/word value.
•
Implemented as: move GR, @DP[1]--
25.3.7 – UROM_moveBP
Function UROM_moveBP
Summary Reads the byte/word value pointed to by BP[OFFS].
Inputs BP[OFFS]: 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 BP[OFFS] 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 BP[OFFS] as the data pointer before reading the byte/word value.
• Implemented as: move GR, @
BP[OFFS]
25.3.8 – UROM_moveBPinc
Function UROM_moveBPinc
Summary Reads the byte/word value pointed to by BP[OFFS], then increments OFFS.
Inputs BP[OFFS]: Address to read from data space (include 8000h offset if reading from flash).
Outputs GR: Data byte/word read. OFFS is incremented.
Destroys None
Notes:
• Before calling this function, DPC should be set appropriately to configure BP[OFFS] 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 BP[OFFS] as the data pointer before reading the byte/word value.
• Implemented as: move GR, @
BP[OFFS++]