xr68c681 Exar Corporation, xr68c681 Datasheet - Page 29

• Manufacturer Part Number: xr68c681
• Description: Cmos Dual Channel Uart Duart
• Manufacturer: Exar Corporation

D.4 External Inputs
Section E
Bit 7
CSR[7:4]
CSR[3:0]
Field
Table 9. Bit Format of the Clock Select Registers CSR[3:0] and CSR[7:4]
Bit 6
Table 8. Bit Format of the Clock Select Registers, CSRA and CSRB
Table 9
Bit 5
ACR[7] = 0 (Bit Rate Set #1)
X = 0
Bit 4
X = 1
D.5 Clock Select Registers, CSRA and CSRB
Figure 5
Bit 3
Bit Rate
Bit 2
Table 8
ACR[7] = 1 (Bit Rate Set #2)
X = 0
XR68C681
Bit 1
Table 9
X = 1
Bit 0