XR21V1410 Datasheet, PDF (11/23 Pages) Exar Corporation – 1-CH FULL-SPEED USB UART

REV. 1.0.0
NAME
CDC_ACM_IF
SEND_BREAK
XR_SET_REG
XR_GETN_REG
XR21V1410
1-CH FULL-SPEED USB UART
TABLE 3: SUPPORTED USB CONTROL COMMANDS
REQUEST
TYPE
REQUEST
VALUE
INDEX
0x21
35
val val 0, 2, 0
LSB MSB ^{4, 6}
LENGTH
DESCRIPTION
0
0 Send a break for the speci-
fied duration
0x40
0
val 0 regis- block 0 0 Exar custom command: set
ter
one 8-bit register
val: 8-bit register value
register address: see
Table 6
block number: see Table 4
0xC0
1
0 0 regis- block count count Exar custom register: get
ter
LSB MSB
count 8-bit registers
register address: see
Table 6
block number: see Table 4
2.1 UART Block Numbers
The table below lists the block numbers for accessing each of the UART channels and the UART Manager..
TABLE 4: CONTROL BLOCKS
BLOCK NAME
BLOCK NUMBER
DESCRIPTION
UART
0
The configuration and control registers for UART.
Reserved
1-3
Block Numbers 1-3 are Reserved
UART Manager
4
The control registers for the UART Manager. The UART Manager
enables/disables the TX and RX FIFOs for each UART.
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