Rainbow Electronics AT75C310 - Manual (Page 70)

AT75C310
70
USART Receiver Holding Register
Name: US_RHR
Access Type: Read-only
• RXCHR: Received Character
Last character received if RXRDY is set. When number of data bits is less than eight, the bits are right-aligned.
All unused bits read as zero.
USART Transmitter Holding Register
Name: US_THR
Access Type: Write-only
• TXCHR: Character to be Transmitted
Next character to be transmitted after the current character if TXRDY is not set. When number of data bits is less than
eight, the bits are right-aligned.
31 30 29 28 27 26 25 24
– – – – – – – –
23 22 21 20 19 18 17 16
– – – – – – – –
15 14 13 12 11 10 9 8
– – – – – – – RXCHR
7 6 5 4 3 2 1 0
RXCHR
31 30 29 28 27 26 25 24
– – – – – – – –
23 22 21 20 19 18 17 16
– – – – – – – –
15 14 13 12 11 10 9 8
– – – – – – – TXCHR
7 6 5 4 3 2 1 0
TXCHR