參數(shù)資料
型號(hào): SAA7348GP
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: All Compact Disc Engine ACE
中文描述: 8-BIT, MROM, 35 MHz, MICROCONTROLLER, PQFP100
文件頁(yè)數(shù): 37/60頁(yè)
文件大?。?/td> 205K
代理商: SAA7348GP
1997 Jul 11
37
Philips Semiconductors
Preliminary specification
All Compact Disc Engine (ACE)
SAA7348GP
8.1.15
DIV17 R
EGISTER
(address 0X9FH)
This register can be used to generate the serial communication baud rate. If this method is chosen, the baud rate will be
62259
×
P. The 5 LSBs of DIV17 hold the value of P. The 2 MSBs connect this baud rate generator to UART 1 or UART 2
(see Table 28). The register is byte addressable; R/W.
Table 28
Baud rate to UART connection
Of course in ACE it is still possible to use timers 1 and 2 to generate the baud rate. Table 29 provides an overview of
how various baud rates can be generated using timer 1, timer 2, and DIV17.
Table 29
Baud rate selection, timer based; note 1
Note
1.
X = don’t care.
BIT 7
BIT 6
DESCRIPTION
0
0
1
1
0
1
0
1
baud rate generator not selected
select baud rate generator only for UART1
select baud rate generator only for UART2
select baud rate generator for UART1 and UART2
BAUD RATE
kBAUD
μ
PCLK
(MHz)
MODE
SMOD
RELOAD
TIMER 1
RELOAD
TIMER 2
DIV17
(ACE)
1411.20
996.14
529.20
498.07
373.55
264.60
249.04
186.78
124.52
88.20
66.15
62.26
44.10
33.08
9.80
16.9344
16.9344
16.9344
16.9344
16.9344
16.9344
16.9344
16.9344
16.9344
16.9344
16.9344
16.9344
16.9344
16.9344
16.9344
0
X
2
X
X
2
X
X
X
1
1
X
1
1
1
X
1
1
1
1
0
1
1
1
1
X
1
0
X
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
16
X
8
6
X
4
3
2
X
X
1
X
X
X
0XFF
X
X
0XFF
X
0XF7
0XFFF0
X
X
0XFFE8
X
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