參數(shù)資料
型號(hào)： DSP56857BUE
廠商： Freescale Semiconductor
文件頁數(shù)： 6/53頁
文件大?。?/td> 0K
描述： IC DSP 16BIT 120MHZ 100-LQFP
標(biāo)準(zhǔn)包裝： 90
系列： 568xx
核心處理器： 56800E
芯體尺寸： 16-位
速度： 120MHz
連通性： SCI，SPI，SSI
外圍設(shè)備： DMA，POR，WDT
輸入/輸出數(shù)： 47
程序存儲(chǔ)器容量： 80KB（40K x 16）
程序存儲(chǔ)器類型： SRAM
RAM 容量： 24K x 16
電壓 - 電源 (Vcc/Vdd)： 1.62 V ~ 1.98 V
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 100-LQFP
包裝： 托盤
56857 Technical Data, Rev. 6
14
Freescale Semiconductor
85
HREQ
HTRQ
GPIOB14
Open Drain
Output
Open Drain
Output
Input/Output
Host Request (HREQ)—When the HI08 is programmed for HRMS=0
functionality (typically used on a single-data- strobe bus), this open drain
output is used by the HI to request service from the host processor. The
HREQ may be connected to an interrupt request pin of a host processor,
a transfer request of a DMA controller, or a control input of external
circuitry.
These pins are disconnected internally.
Transmit Host Request (HTRQ)—This signal is the Transmit Host
Request output when the HI08 is programmed for HRMS=1 functionality
and is typically used on a double-data-strobe bus.
Port B GPIO (14) —This pin is a General Purpose I/O (GPIO) pin when
not configured for host port usage.
86
HACK
HRRQ
GPIOB15
Input
Open Drain
Output
Input/Output
Host Acknowledge (HACK)—When the HI08 is programmed for
HRMS=0 functionality (typically used on a single-data-strobe bus), this
input has two functions: (1) provide a Host Acknowledge signal for DMA
transfers or (2) to control handshaking and provide a Host Interrupt
Acknowledge compatible with the MC68000 family processors.
These pins are disconnected internally during reset.
Receive Host Request (HRRQ)—This signal is the Receive Host
Request output when the HI08 is programmed for HRMS=1 functionality
and is typically used on a double-data-strobe bus.
Port B GPIO (15)—This pin is a General Purpose I/O (GPIO) pin when
not configured for host port usage.
81
TIO0
GPIOG0
Input/Output
Input/Output
Timer Input/Output (TIO0)—This pin can be independently configured to
be either a timer input source or an output flag.
Port G GPIO (0)—This pin is a General Purpose I/O (GPIO) pin that can
individually be programmed as an input or output pin.
79
TIO1
GPIOG1
Input/Output
Input/Output
Timer Input/Output (TIO1)—This pin can be independently configured to
be either a timer input source or an output flag.
Port G GPIO (1)—This pin is a General Purpose I/O (GPIO) pin that can
individually be programmed as an input or output pin.
78
TIO2
GPIOG2
Input/Output
Input/Output
Timer Input/Output (TIO2)—This pin can be independently configured to
be either a timer input source or an output flag.
Port G GPIO (2)—This pin is a General Purpose I/O (GPIO) pin that can
individually be programmed as an input or output pin.
Table 3-1 56857 Signal and Package Information for the 100-pin LQFP (Continued)
Pin No.
Signal Name
Type
Description
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