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SE370C769A Datasheet(PDF) 5 Page - Texas Instruments |
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SE370C769A Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 73 page  TMS370Cx6x 8-BIT MICROCONTROLLER SPNS033C – SEPTEMBER 1995 – REVISED FEBRUARY 1997 5 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 description (continued) D One 24-bit general-purpose watchdog timer D Three 16-bit general-purpose timers (one with an 8-bit prescaler) Table 2 provides a memory configuration overview of the TMS370Cx6x devices. Table 2. Memory Configurations DEVICE PROGRAM MEMORY (BYTES) OFF-CHIP MEMORY EXP (BYTES) DATA MEMORY (BYTES) OPERATING MODES PACKAGES 68-PIN PLCC/CLCC ROM EPROM EXP. (BYTES) RAM EEPROM µC† µP† TMS370C067A 24K — 24K 1K 256 √ √ FN – PLCC TMS370C068A 32K — 24K 1K 256 √ √ FN – PLCC TMS370C069A 48K‡ — 8K 3.5K 256 √ √ FN – PLCC TMS370C768A — 32K 24K 1K 256 √ √ FN – PLCC TMS370C769A — 48K‡ 8K 3.5K 256 √ √ FN – PLCC SE370C768A§ — 32K 24K 1K 256 √ √ FZ – CLCC SE370C769A§ — 48K‡ 8K 3.5K 256 √ √ FZ – CLCC † µC – Microcomputer mode µP – Microprocessor mode ‡ ’x69 can only operate up to 3 MHz SYSCLK. § 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 2 indicates the configuration of the device. ROM or EPROM devices have different configurations as indicated in Table 3. ROM devices with the suffix letter A are configured through a programmable contact during manufacture. Table 3. Suffix Letter Configuration DEVICE¶ WATCHDOG TIMER CLOCK LOW-POWER MODE EPROM A 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 mask-programmable ROM in the associated TMS370C06x devices is replaced in the TMS370C76x with 32K or 48K bytes of EPROM while all the other available memory and on-chip peripherals are identical. One-time-programmable (OTP) (TMS370C768 and TMS370C769) and reprogrammable devices (SE370C768 and SE370C769) are available. TMS370C768 and TMS370C769 are OTP devices that are available in plastic packages. This microcomputer is effective to use for immediate production updates for other members of the TMS370Cx6x family or for low-volume production runs when the mask charge or cycle time for low-cost mask-ROM devices is not practical. The SE370C768 and SE370C769 have windowed ceramic packages to allow reprogramming of the program EPROM memory during the development / prototyping phase of design. The SE370C768 and SE370C769 devices allow quick updates to breadboards and prototype systems while iterating initial designs. |
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