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| 型號(hào)： | MPC8377VRAGDA |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 11/127頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | MPU POWERQUICC II 400MHZ 689PBGA |
| 標(biāo)準(zhǔn)包裝： | 27 |
| 系列： | MPC83xx |
| 處理器類型： | 32-位 MPC83xx PowerQUICC II Pro |
| 速度： | 400MHz |
| 電壓： | 1V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 689-BBGA 裸露焊盤(pán) |
| 供應(yīng)商設(shè)備封裝： | 689-TEPBGA II（31x31） |
| 包裝： | 托盤(pán) |
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MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 8
108
Freescale Semiconductor
As shown in Figure 64, the primary clock input (frequency) is multiplied up by the system phase-locked
loop (PLL) and the clock unit to create the coherent system bus clock (csb_clk), the internal clock for the
DDR controller (ddr_clk), and the internal clock for the local bus interface unit (lbiu_clk).
The csb_clk frequency is derived from a complex set of factors that can be simplified into the following
equation:
csb_clk = {PCI_SYNC_IN × (1 + CFG_CLKIN_DIV)} × SPMF
Eqn. 20
In PCI host mode, PCI_SYNC_IN × (1 + CFG_CLKIN_DIV) is the CLKIN frequency.
The csb_clk serves as the clock input to the e300 core. A second PLL inside the e300 core multiplies up
the csb_clk frequency to create the internal clock for the e300 core (core_clk). The system and core PLL
multipliers are selected by the SPMF and COREPLL fields in the reset configuration word low register
(RCWLR) which is loaded at power-on reset or by one of the hard-coded reset options. See Chapter 4,
“Reset, Clocking, and Initialization,” in the MPC8379E Reference Manual for more information on the
clock subsystem.
The internal ddr_clk frequency is determined by the following equation:
ddr_clk = csb_clk × (1 + RCWLR[DDRCM])
Eqn. 21
Note that ddr_clk is not the external memory bus frequency; ddr_clk passes through the DDR clock divider
(
÷2) to create the differential DDR memory bus clock outputs (MCK and MCK). However, the data rate
is the same frequency as ddr_clk.
The internal lbiu_clk frequency is determined by the following equation:
lbiu_clk = csb_clk × (1 + RCWLR[LBCM])
Eqn. 22
Note that lbiu_clk is not the external local bus frequency; lbiu_clk passes through the LBIU clock divider
to create the external local bus clock outputs (LCLK[0:2]). The eLBC clock divider ratio is controlled by
LCRR[CLKDIV].
Some of the internal units may be required to be shut off or operate at lower frequency than the csb_clk
frequency. Those units have a default clock ratio that can be configured by a memory mapped register after
the device comes out of reset. Table 73 specifies which units have a configurable clock frequency.
Table 73. Configurable Clock Units
Unit
Default Frequency
Options
eTSEC1, eTSEC2
csb_clk/3
Off,
csb_clk, csb_clk/2, csb_clk/3
eSDHC and I2C11
csb_clk/3
Off,
csb_clk, csb_clk/2, csb_clk/3
Security block
csb_clk/3
Off,
csb_clk, csb_clk/2, csb_clk/3
USB DR
csb_clk/3
Off,
csb_clk, csb_clk/2, csb_clk/3
PCI and DMA complex
csb_clk
Off,
csb_clk
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MPC8377VRAGFA | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Processor Hardware Specifications |
| MPC8377VRAGGA | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Processor Hardware Specifications |
| MPC8377VRAJDA | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Processor Hardware Specifications |
| MPC8377VRAJF | 功能描述:微處理器 - MPU PBGA W/O ENCR RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| MPC8377VRAJFA | 功能描述:微處理器 - MPU 8377 PBGA ST PbFr No ENC RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
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