Datasheet

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MAX9257A/MAX9258A
Fully Programmable Serializer/Deserializer
with UART/I
2
C Control Channel
Table 1. MAX9257A Power-Up Default Register Map (continued)
REGISTER NAME
REGISTER
ADDRESS (hex)
POWER-UP VALUE
(hex)
POWER-UP DEFAULT SETTINGS
REG5 0x05 0xFA MAX9257A address = 1111 1010
REG6 0x06 0xFF End frame = 1111 1111
REG7 0x07 0xF8 MAX9258A address = 1111 1000
REG8 0x08 0x00
INTMODE = 0, interface with peripheral is UART
INTEN = 0, interface with peripheral is disabled
FAST = 0, UART bit rate = DC to 4.25Mbps
CTO = 000, never come back
BITRATE = 00, base mode bit rate = 95kbps to 400kbps
REG9 0x09 0x00
PRBSLEN = 0000, PRBS word length = 2
21
GPIO9DIR = 0, GPIO9 = input
GPIO8DIR = 0, GPIO8 = input
GPIO9 = 0
GPIO8 = 0
REG10 0x0A 0x00
GPIO7DIR = 0, GPIO7 = input
GPIO6DIR = 0, GPIO6 = input
GPIO5DIR = 0, GPIO5 = input
GPIO4DIR = 0, GPIO4 = input
GPIO3DIR = 0, GPIO3 = input
GPIO2DIR = 0, GPIO2 = input
GPIO1DIR = 0, GPIO1 = input
GPIO0DIR = 0, GPIO0 = input
REG11 0x0B 0x00
GPIO7 = 0
GPIO6 = 0
GPIO5 = 0
GPIO4 = 0
GPIO3 = 0
GPIO2 = 0
GPIO1 = 0
GPIO0 = 0
REG12 0x0C 0xE0
PREEMP = 111, preemphasis = 0%
Reserved = 00000
REG13 0x0D 0x00
Reserved = 000000
I2CFILT = 00, I
2
C glitch filter settings:
1) 95kbps to 400kbps = 100ns
2) 400kbps to 1000kbps = 50ns
3) 1000kbps to 4250kbps = 10ns
REG14 0x0E 0x00
Reserved = 0000 000
LOCKED = read only