SMJS851A − NOVEMBER 1997 − REVISED MARCH 1998
2
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
description 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
device symbol nomenclature 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
logic symbol for TMS28F008Axy 40-pin package 6. . . . . . . . . . .
logic symbol for TMS28F800Axy 44-pin package 7. . . . . . . . . . .
logic symbol for TMS28F800Axy 48-pin package 8. . . . . . . . . . .
functional block diagram 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
architecture 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
block memory maps 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
boot-block data protection 12. . . . . . . . . . . . . . . . . . . . . . . . . .
parameter block 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
main block 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
data protection 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
command-state machine (CSM) 13. . . . . . . . . . . . . . . . . . . . .
operation 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
command definition 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
status register 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
byte-wide or word-wide mode selection 16. . . . . . . . . . . . . . .
command-state machine (CSM) operations 18. . . . . . . . . . .
clear status register 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
read operations 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
programming operations 19. . . . . . . . . . . . . . . . . . . . . . . . . . . .
erase operations 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
automatic power-saving mode 20. . . . . . . . . . . . . . . . . . . . . . .
reset/ deep power-down mode 20. . . . . . . . . . . . . . . . . . . . . . .
absolute maximum ratings 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
recommended operating conditions 27. . . . . . . . . . . . . . . . . . . . .
word/byte typical write and block-erase performance 27. . . . . .
electrical characteristics 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
power-up and reset switching characteristics for
TMS28F008ASy or ’AEy and
TMS28F800ASy or ’AEy 30. . . . . . . . . . . . . . . . . . . . . . . . . .
power-up and reset switching characteristics for
TMS28F008AVy or ’ALy and
TMS28F800AVy or ’ALy 34. . . . . . . . . . . . . . . . . . . . . . . . . . .
power-up and reset switching characteristics for
TMS28F008AZy and TMS28F800AZy 37. . . . . . . . . . . . . .
Parameter Measurement Information 40. . . . . . . . . . . . . . . . . . . .
mechanical data
DBJ (R-PDSO-G44) 48. . . . . . . . . . . . .
mechanical data
DCD (R-PDSO-G**) 49. . . . . . . . . . . . . .
Table of Contents
description
The TMS28F800Axy is a 8388608-bit, boot-block flash memory that can be electrically block-erased and
reprogrammed. The TMS28F800Axy is organized in a blocked architecture consisting of:
D One 16K-byte/8K-word protected boot block
D Two 8K-byte/4K-word parameter blocks
D One 96K-byte/48K-word main block
D Seven 128K-byte/64K-word main blocks
The device can be ordered in four different voltage configurations (see Table 1). Operation as a 1024K-byte
(8-bit) or a 512K-word (16-bit) organization is user-definable.
Embedded program and block-erase functions are fully automated by the on-chip write-state machine (WSM),
simplifying these operations and relieving the system microcontroller of these secondary tasks. WSM status
can be monitored by an on-chip status register to determine progress of program/erase tasks. The device
features user-selectable block erasure.
The TMS28F800AEy configuration allows the user to perform memory reads using 2.7−3.6-V V
CC
and 5-V V
CC
for optimum power consumption. Erasing or programming the device can be accomplished with V
PP
= 3 V,
5 V, or 12-V. This configuration is offered in the commercial temperature range (0°C to 70°C) and the extended
temperature range (−40°C to 85°C). Also, TMS28F800ASy offers V
CC
= 3 − 3.6 V and V
CC
= 5 V for optimum
power consumption. The TMS28F800ALy configuration allows performance of memory reads using
V
CC
= 3.0 − 3.6 V for optimum power consumption. The TMS28F800AVy configuration allows performance of
memory reads using V
CC
= 2.7−3.6 V for optimum power consumption.
The TMS28F800AZy configuration offers a 5-V memory read with a 3-V/5-V/12-V program and erase. This
configuration is offered in three temperature ranges: 0°C to 70°C, − 40°C to 85°C, − 40°C to 125°C.
The TMS28F800Axy is offered in a 44-pin plastic small-outline package (PSOP) and a 48-pin thin small-outline
package (TSOP) organized as 16-bit or 8-bit.
The TMS28F008 is functionally equivalent to the ’F800 except that it is organized only as a 8-bit configuration,
and it is offered only in a 40-pin TSOP.
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