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SM320VC33GNMM150EP bảng dữ liệu(PDF) 9 Page - Texas Instruments |
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SM320VC33GNMM150EP bảng dữ liệu(HTML) 9 Page - Texas Instruments |
9 / 62 page SM320VC33-EP DIGITAL SIGNAL PROCESSOR SGUS037C -- AUGUST 2002 -- REVISED JANUARY 2003 9 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251--1443 Terminal Functions TERMINAL TYPE† DESCRIPTION CONDITIONS WHEN NAME QTY TYPE† DESCRIPTION WHEN SIGNAL IS Z TYPE‡ PRIMARY-BUS INTERFACE D31 D0 32 I/O/Z 32-bit data port S H R D31--D0 32 I/O/Z Data port bus keepers. (See Figure 8) S A23--A0 24 O/Z 24-bit address port S H R R/W 1 O/Z Read/write. R/W is high when a read is performed and low when a write is performed over the parallel interface. S H R STRB 1 O/Z Strobe. For all external-accesses S H PAGE0 -- PAGE3 1 O/Z Page strobes. Four decoded page strobes for external access S H R RDY 1 I Ready. RDY indicates that the external device is prepared for a transaction completion. HOLD 1 I Hold. When HOLD is a logic low, any ongoing transaction is completed. A23--A0, D31--D0, STRB, and R/W are placed in the high-impedance state and all transactions over the primary-bus interface are held until HOLD becomes a logic high or until the NOHOLD bit of the primary-bus-control register is set. HOLDA 1 O/Z Hold acknowledge. HOLDA is generated in response to a logic-low on HOLD. HOLDA indicates that A23--A0, D31--D0, STRB, and R/W are in the high-impedance state and that all transactions over the bus are held. HOLDA is high in response to a logic-high of HOLD or the NOHOLD bit of the primary-bus-control register is set. S CONTROL SIGNALS RESET 1 I Reset. When RESET is a logic low, the device is in the reset condition. When RESET becomes a logic high, execution begins from the location specified by the reset vec- tor. EDGEMODE 1 I Edge mode. Enables interrupt edge mode detection. INT3--INT0 4 I External interrupts IACK 1 O/Z Internal acknowledge. IACK is generated by the IACK instruction. IACK can be used to indicate when a section of code is being executed. S MCBL/MP 1 I Microcomputer Bootloader/microprocessor mode-select SHZ 1 I Shutdown high impedance. When active, SHZ places all pins in the high-impedance state. SHZ can be used for board-level testing or to ensure that no dual-drive conditions occur. CAUTION: A low on SHZ corrupts the device memory and register contents. Reset the device with SHZ high to restore it to a known operating condition. XF1, XF0 2 I/O/Z External flags. XF1 and XF0 are used as general-purpose I/Os or to support interlocked processor instruction. S R SERIAL PORT 0 SIGNALS CLKR0 1 I/O/Z Serial port 0 receive clock. CLKR0 is the serial shift clock for the serial port 0 receiver. S R CLKX0 1 I/O/Z Serial port 0 transmit clock. CLKX0 is the serial shift clock for the serial port 0 transmitter. S R DR0 1 I/O/Z Data-receive. Serial port 0 receives serial data on DR0. S R DX0 1 I/O/Z Data-transmit output. Serial port 0 transmits serial data on DX0. S R FSR0 1 I/O/Z Frame-synchronization pulse for receive. The FSR0 pulse initiates the data-receive process using DR0. S R FSX0 1 I/O/Z Frame-synchronization pulse for transmit. The FSX0 pulse initiates the data-transmit process using DX0. S R † I = input, O = output, Z = high-impedance state ‡ S=SHZ active, H = HOLD active, R = RESET active § Recommended decoupling. Four 0.1 μFfor CVDD and eight 0.1 μFfor DVDD. |
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