XR21B1420IL28-0A Datasheet, PDF (38/60 Pages) Exar Corporation – Enhanced 1-Ch Full-Speed USB UART

XR21B1420
OTP Map
Note that all OTP memory locations are 8 bits wide.
Address
Register Name
0x000
0x007
HW_CONFIG
CDC_ACM_OVERRIDES
0x008
CDC_ACM_FLOW
0x009
CDC_ACM_MODE_LSB
0x00A
CDC_ACM_MODE_MSB
0x00B
0x00C
0x00D
0x00E
0x00F
0x010
0x011
0x012
0x013
0x014
0x015
0x016
0x017
CDC_ACM_GPIO_DIR_LSB
CDC_ACM_GPIO_DIR_MSB
CDC_ACM_GPI-
O_INT_MASK_LSB
CDC_ACM_GPI-
O_INT_MASK_MSB
CDC_ACM_BAUD_THRESH_0
CDC_ACM_BAUD_THRESH_1
CDC_ACM_BAUD_THRESH_2
VID_LSB
VID_MSB
PID_LSB
PID_MSB
USB_MAX_POWER
USB_ATTRIBUTES
0x018
0x019
0x01A
RELEASE_MAJOR
RELEASE_MINOR
AUTO_FLUSH
0x01B
LOCK_BYTE_0
0x01C
LOCK_BYTE_1
0x01F
PIN_CFG_USB_STAT1
Table 9: XR21B1420 OTP Memory
Bit 7
0
0
0
CLK_
EN
0
GPIO7
0
GPIO7
Bit 6
LOCK
0
0
Bit 5
Bit 4
Reserved
0
BAUD_-
THRES
H
0
0
RS485_SEL
0
0
RS485_
PIN
0
GPIO6
0
GPIO6
GPIO5
0
GPIO5
GPIO4
0
GPIO4
Bit 3
GPI-
O_INT_
MASK
Half-
Duplex
RS485_
POL
0
GPIO3
0
GPIO3
Bit 2
Bit 1
GPI-
O_DIR
GPIO_-
MODE
Mode Select
Mode Select
0
GPIO2
0
GPIO2
RX_-
TOG
GPIO1
GPIO9
GPIO1
Bit 0
FLOW
TX_TOG
GPIO0
GPIO8
GPIO0
0
0
0
0
0
RX
GPIO9 GPIO8
THRESH[7:0]
THRESH[15:8]
THRESH[23:16]
VALUE[7:0]
VALUE[15:8]
VALUE[7:0]
VALUE[15:8]
VALUE
0
0
VALUE
VALUE
0
0
LANG_
ID
VEN_
STRG2
0
0
VEN_
STRG1
0
0
0
0
FLUSH
0
0
RX_
CLOSE
0
REL
SEL
RMT_W
AKE_EN
RMT_
WAKE_V
ALID
PWR_MODE
RX_
OPEN
PIN_-
CONFIG
USB_
ATTRIB
TX_
CLOSE
SER_
STRG
MAX_
POWER
TX_
OPEN
PROD_
STRG2
PID
CTRL
0
PROD_
STRG1
VID
© 2014 Exar Corporation
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exar.com/XR21B1420
Rev 1A