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TMS370C077AFNL Datasheet(PDF) 5 Page - Texas Instruments |
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TMS370C077AFNL Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 60 page  TMS370Cx7x 8-BIT MICROCONTROLLER SPNS034C – SEPTEMBER 1995 – REVISED FEBRUARY 1997 5 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 description (continued) Table 1 provides a memory configuration overview of the TMS370Cx7x devices. Table 1. Memory Configurations DEVICE PROGRAM MEMORY (BYTES) DATA MEMORY (BYTES) PACKAGES 68-PIN PLCC/CLCC, OR 64 PIN PSDIP/CSDIP ROM EPROM RAM EEPROM 64-PIN PSDIP/CSDIP TMS370C077A 24K — 512 256 FN – PLCC / NM – PSDIP TMS370C777A — 24K 512 256 FN – PLCC / NM – PSDIP SE370C777A† — 24K 512 256 FZ – CLCC / JN – CSDIP † System evaluators and development tools are for use only in a prototype environment, and their reliability has not been characterized. The suffix letter A appended to the device names shown in the device column of Table 1 indicates the configuration of the device. ROM and EPROM devices have a different configuration as indicated in Table 2. ROM devices with the suffix letter A are configured through a programmable contact during manufacture. Table 2. Suffix Letter Configuration DEVICE‡ WATCHDOG TIMER CLOCK LOW-POWER MODE EPROM A Standard Divide by 4 (Standard oscillator) Enabled Standard Divide-by-4 (Standard oscillator) Enabled Standard ROM A Hard Divide-by-4 or Divide-by-1 (PLL) Enabled or disabled Simple ‡ Refer to the “device numbering conventions” section for device nomenclature and the “device part numbers” section for ordering. The 24K bytes of mask-programmable ROM in the associated TMS370C077 device are replaced with 24K bytes of EPROM in the TMS370C777 while all other available memory and on-chip peripherals are identical. A one-time-programmable device (OTP) (TMS370C777) and a reprogrammable device (SE370C777) are available. The TMS370C777 OTP device is available in a plastic package. This microcontroller is effective for use as an immediate production update for the TMS370C077 ROM device or for low-volume production runs when the mask charge or cycle time for the low-cost mask-ROM device is not practical. The SE370C777 has a windowed ceramic package that allows reprogramming of the program EPROM memory during the development / prototyping design phase. The SE370C777 device allows quick updates to breadboards and prototype systems while iterating initial designs. The TMS370Cx7x family provides two low-power modes (STANDBY and HALT) for applications where low-power consumption is critical. Both modes stop all CPU activity (that is, no instructions are executed). In the STANDBY mode, the internal oscillator and the general-purpose timer remain active. In the HALT mode, all device activity is stopped. The device retains all RAM data and peripheral configuration bits throughout both low-power modes. The TMS370Cx7x features advanced register-to-register architecture that allows direct arithmetic and logical operations without requiring an accumulator (for example, ADD R24, R47; add the contents of register 24 to the contents of register 47 and store the result in register 47). The TMS370Cx7x family is fully instruction-set-compatible, allowing easy transition between members of the TMS370 8-bit microcontroller family. |
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