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參數(shù)資料
| 型號(hào)： | SMQ320C32PCMM60 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 數(shù)字信號(hào)處理 |
| 英文描述： | 24-BIT, 60 MHz, OTHER DSP, PQFP144 |
| 封裝： | PLASTIC, QFP-144 |
| 文件頁(yè)數(shù)： | 6/50頁(yè) |
| 文件大?。?/td> | 674K |
| 代理商： | SMQ320C32PCMM60 |
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SMQ320C32
DIGITAL SIGNAL PROCESSOR
SGUS027B – APRIL 1998 – REVISED MARCH 1999
14
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
power management
The SMQ320C32 CPU has two power-management modes, IDLE2 and LOPOWER (low power). In IDLE2
mode, no instructions are executed and the CPU, peripherals, and memory retain their previous state while the
external bus output pins are idle. During IDLE2 mode, the H1 clock signal is held high while the H3 clock signal
is held low until one of the four external interrupts is asserted. In the LOPOWER mode, the CPU continues to
execute instructions and the DMA continues to perform transfers, but at a reduced clock rate of the CLKIN
frequency divided by 16 (that is, SMQ320C32 with a 32-MHz CLKIN frequency performs the same as a 2-MHz
SMQ320C32 with an instruction cycle time of 1000 ns or 1 MHz.
bootloader
The SMQ320C32 flexible bootloader loads programs from the serial port, EPROM, or other standard
non-volatile memory device. The boot-loader functionality of the SMQ320C32 is equivalent to that of the
’320C31, and has added modes to handle the data-type sizes and memory widths supported by the external
memory interface. The memory-bootload supports data transfers with and without handshaking. The
handshake mode allows synchronous transfer of programs by using two pins as data-acknowledge and
data-ready signals.
peripherals
The SMQ320C32 peripherals are comprised of one serial port, two timers, and two DMA channels. The serial
port and timers are functionally identical to those in the ’320C31 peripherals. The SMQ320C32 two-channel
DMA coprocessor has user-configurable priorities: CPU, DMA, or rotating between CPU and DMA.
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