UART Control Status Register - 1.0 English - PG428

MicroBlaze Debug Module V (MDM V) LogiCORE IP Product Guide (PG428)

Document ID: PG428
Release Date: 2025-06-11
Version: 1.0 English

This register is read-write and accessed with the custom1 Debug Module register at hexadecimal address 71.

Table 1. UART Status Register (custom1) - Read
Reserved		UART_STATUS
31	4	3	0

Table 2. UART Status Register Bit Definitions - Read
Bits	Name	Access	Reset Value	Description
31-4	Reserved	N/A	0	Reserved
3	RX Buffer Full	R	0	Receive buffer full – Do not write data to the UART Read Write Byte register
2	RX Data Not Present	R	1	Receive buffer empty – It is possible to write up to 16 characters to the UART Read Write Byte register.
1	TX Buffer Full	R	0	Transmit buffer full – It is possible to read 16 characters from the UART Read Write Byte register.
0	TX Data Present	R	0	Transmit buffer has data – It is possible to read a single character from the UART Read Write Byte register.

Table 3. UART Control Register (custom1) - Write
Reserved		TX Buffered
31	1	0

Table 4. UART Control Register Bit Definitions - Write
Bits	Name	Access	Reset Value	Description
31-1	Reserved	N/A	0	Reserved
0	TX Buffered	W	0	When set to 1, characters written by MicroBlaze V are not discarded