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| 型號(hào)： | 73S1217F-EB |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 47/93頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL 73S1217F CBL/DOC/CD |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | * |
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UG_12xxF_016
73S12xxF Software User Guide
Rev. 1.50
51
Return Codes
None.
4.2.8
Clock Generator Circuit API – Available with all 73S12xxF Devices
The Clock Generator API configures the system clock speed.
CPU_Select()
Purpose
Select the CPU speed. This API should be called after API_Init() is called if a
change in CPU speed is desired. The default speed is 3.69 MHz. Care should be
taken when selecting speeds other than 3.69 MHz, as the speed will affect the
number of supported Serial baud rates and timers API. The timer and Serial baud
rates will be adjusted internally by the LAPI. A wait state will be inserted to allow
USB I/O access time, i.e. CKCON will be set to the appropriate value to adjust wait
states.
Synopsis
void CPU_Select ( enum CPU_SPEED speed )
Parameters
speed: Input parameter
Specifies which CPU speed to run. Possible values are
CPU_3Mhz69 0,
CPU_6Mhz
1,
CPU_12Mhz
2,
CPU_24Mhz
3
Return Codes
None.
Some CPU speeds will limit the number of Serial baud rates supported. Table 4 lists the baud rates
supported by specific CPU clock rates.
Table 4: Clock Speeds and Baud Rates Supported
Baud Rate (bps)
CPU Clock Rate
3.69
MHz
6 MHz
12
MHz
24 MHz
600
X
1200
X
2400
X
4800
X
9600
X
14400
X
19200
X
28800
X
38400
X
57600
X
115200
X
115385
X
187500
X
375000
X
750000
X
//Can only support these rates when the CPU is running at 3.69 MHz
//CPU_3Mhz69
{BPS_600_3MHz69, BPS_1200_3MHz69, BPS_2400_3MHz69, BPS_4800_3MHz69,
BPS_9600_3MHz69, BPS_14400_3MHz69, BPS_19200_3MHz69, BPS_28800_3MHz69,
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