W83627EHG Nuvoton Technology Corporation of America, W83627EHG Datasheet - Page 165

• Manufacturer Part Number: W83627EHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627EHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.2.8
Two 8-bit registers, BLL and BHL, compose a programmable baud generator that uses 24 MHz to
generate a 1.8461 MHz frequency and divide it by a divisor from 1 to (2
the baud generator is the baud rate multiplied by 16, and this is the base frequency for the transmitter
and receiver. The table below illustrates the use of the baud generator with a frequency of 1.8461
MHz. In high-speed UART mode (CR0C, bits 7 and 6), the programmable baud generator directly uses
24 MHz and the same divisor as the normal speed divisor. As a result, in high-speed mode, the data
transmission rate can be as high as 1.5M bps.
PRE-DIV: 13
1.8461M HZ
134.5
1200
1800
2000
2400
3600
4800
7200
9600
110
150
300
600
50
75
Programmable Baud Generator (BLL/BHL) (Read/Write)
PRE-DIV:1.62
14.769M HZ
14400
16000
19200
28800
38400
57600
76800
1076
1200
2400
4800
9600
400
600
880
5
BAUD RATE FROM DIFFERENT PRE-DIVIDER
PRE-DIV:
24M HZ
124800
1478.5
15600
23400
26000
31200
46800
62400
93600
1430
1950
3900
7800
650
975
1.0
W83627EHF/EF, W83627EHG/EG
- 154 -
DECIMAL DIVISOR
GENERATE 16X
USED TO
CLOCK
2304
1536
1047
857
768
384
192
96
64
58
48
32
24
16
12
16
–1). The output frequency of
ERROR PERCENTAGE
0.099%
0.18%
0.53%
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