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TUSB3200CPAH 数据表(PDF) 90 Page - Texas Instruments |
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TUSB3200CPAH 数据表(HTML) 90 Page - Texas Instruments |
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90 / 93 page  A–42 A.5.7.4 Global Control Register (GLOBCTL – Address FFB1h) The global control register contains various global control bits for the TUSB3200 device. Bit 7 6 5 4 3 2 1 0 Mnemonic MCUCLK XINTEN PUDIS — — LPWR — CPTEN Type R/W R/W R/W R R R/W R R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7 MCUCLK MCU clock select The MCU clock select bit is used by the MCU to program the clock frequency to be used for the MCU operation. 0b = 12 MHz and 1b = 24 MHz 6 XINTEN External interrupt enable The external interrupt enable bit is set to a 1 by the MCU to enable the use of the external interrupt input to the TUSB3200 device. 5 PUDIS Pull-up resistor disable The pull-up resistor disable bit is set to a 1 by the MCU to disable the TUSB3200 on-chip pull-up resistors. 4 — Reserved Reserved for future use 3 — Reserved Reserved for future use 2 LPWR Low power mode disable The low power mode disable bit is used by the MCU to disable the TUSB3200 semi-low power state. When this bit is cleared to a 0, all USB functional blocks including the USB buffers and configuration blocks are powered-down. For normal operation, the MCU must set this bit to a 1. 1 — Reserved Reserved for future use 0 CPTEN CODEC port enable The CODEC port enable bit is set to a 1 by the MCU to enable the operation of the CODEC port interface. Note that the CODEC port interface configuration registers should be fully programmed before this bit is set by the MCU. A.5.7.5 Memory Configuration Register (MEMCFG – Address FFB0h) The memory configuration register contains various bits pertaining to the memory configuration of the TUSB3200 device. Bit 7 6 5 4 3 2 1 0 Mnemonic MEMTYP CODESZ1 CODESZ0 REV3 REV2 REV1 REV0 SDW Type R R R R R R R R/W Default 1 0 1 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7 MEMTYP Code memory type The code memory type bit identifies if the type of memory used for the application program code space is ROM or RAM. For the TUSB3200, an 8K byte RAM is used and this bit is tied to 1. 6:5 CODESZ Code space size The code space size bits identify the size of the application program code memory space. For the TUSB3200, an 8K byte RAM is used and these bits are tied to 01b. 00b = 4K bytes, 01b = 8K bytes, 10b = 16K bytes, 11b = 32K bytes 4:1 REV IC revision The IC revision bits identify the revision of the IC. 0000b = Rev. -, 0001b = Rev. A, …, 1111b = Rev. F 0 SDW Shadow the boot ROM The shadow the boot ROM bit is set to a 1 by the MCU to switch the MCU memory configuration from boot loader mode to normal operating mode. This should occur after completion of the download of the application program code by the boot ROM. |
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