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EZ80F91AZ050EC Datasheet(PDF) 10 Page - Zilog, Inc.

Part # EZ80F91AZ050EC
Description  eZ80Acclaim-TM Flash Microcontrollers
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Manufacturer  ZILOG [Zilog, Inc.]
Direct Link  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

EZ80F91AZ050EC Datasheet(HTML) 10 Page - Zilog, Inc.

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PS019209-0504
PRELIMINARY
Table of Contents
eZ80F91 MCU
Product Specification
x
EMAC Interrupt Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
EMAC PHY Read Status Data Register—Low and High Bytes . . . . . 278
EMAC MII Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
EMAC Receive Write Pointer Register—Low Byte . . . . . . . . . . . . . . . 280
EMAC Receive Write Pointer Register—High Byte . . . . . . . . . . . . . . . 281
EMAC Transmit Read Pointer Register—Low Byte . . . . . . . . . . . . . . 281
EMAC Transmit Read Pointer Register—High Byte . . . . . . . . . . . . . . 282
EMAC Receive Blocks Left Register—Low and High Bytes . . . . . . . . 282
EMAC FIFO Data Register—Low and High Bytes . . . . . . . . . . . . . . . 284
EMAC FIFO Flags Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285
ZiLOG Debug Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
ZDI-Supported Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
ZDI Clock and Data Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
ZDI Start Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
ZDI Single-Bit Byte Separator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
ZDI Register Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
ZDI Write Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
ZDI Single-Byte Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
ZDI Block Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
ZDI Read Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292
ZDI Single-Byte Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292
ZDI Block Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292
Operation of the eZ80F91 Device during ZDI Break Points . . . . . . . . . . . 293
Bus Requests During ZDI Debug Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 293
Potential Hazards of Enabling Bus Requests During Debug Mode . . . 294
ZDI Write Only Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294
ZDI Read Only Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295
ZDI Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
ZDI Address Match Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
ZDI Break Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
ZDI Master Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
ZDI Write Data Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
ZDI Read/Write Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
ZDI Bus Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302
Instruction Store 4:0 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
ZDI Write Memory Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304
eZ80 Product ID Low and High Byte Registers . . . . . . . . . . . . . . . . . . 305
eZ80 Product ID Revision Register . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
ZDI Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307
ZDI Read Register Low, High, and Upper . . . . . . . . . . . . . . . . . . . . . . 308
ZDI Bus Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
ZDI Read Memory Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309


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