Figure 112 - Serial Communication With Fifo; Figure 113 - Example: Writing Data Registers - Nintendo GAME BOY ADVANCE Programming Manual

May 25, 2005
13.3.4 When FIFO is Used
If written to a data register SIODATA8, data is written to a send FIFO. If all the contents of the send shift
register are shifted out, data is transferred from a send FIFO to a shift register, immediately.
Please note when using this operation, that data is immediately transferred to a shift register when the first
data is written to the data register, and the interrupt request condition is met as a send FIFO becomes
empty. Also, when read, data is read from a receive FIFO. (Only the lower 8 bits are valid.)
© 1999-2005 NINTENDO
UART Communication Functions

Figure 112 - Serial Communication with FIFO

Figure 113 - Example: Writing Data Registers

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AGB-06-0001-002-B13
Released: May 27, 2005