Z16c30 usc, Able, Ontents – Zilog Z16C30 User Manual
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Z16C30 USC
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Chapter 1 Introduction
1.1
Introduction ....................................................................................................... 1-1
1.2
Features ............................................................................................................. 1-1
1.3
Logic Symbol ..................................................................................................... 1-2
1.4
Packaging ......................................................................................................... 1-3
1.5
Overview of the USC and this Manual ............................................................... 1-4
1.5.1 Bus Interfacing ....................................................................................... 1-4
1.5.2 Serial Interfacing ..................................................................................... 1-4
1.5.3 Serial Modes and Protocols .................................................................... 1-4
1.5.4 DMA Operation ....................................................................................... 1-4
1.5.5 Interrupts ................................................................................................ 1-4
1.5.6 Software Summary .................................................................................. 1-4
1.6
Device Structure .............................................................................................. 1-12
1.6.1 The Transmit Data Path ........................................................................ 1-12
1.6.2 The Receive Data Path ......................................................................... 1-12
1.6.3 Clocking ................................................................................................ 1-12
1.6.4 Interrupts .............................................................................................. 1-12
1.7
Document Structure ........................................................................................ 1-13
Chapter 2 Bus Interfacing
2.1
Introduction ....................................................................................................... 2-1
2.2
Multiplexed/Non-Multiplexed Operation ............................................................ 2-1
2.3
Read/Write Data Strobes ................................................................................... 2-3
2.4
Bus Width .......................................................................................................... 2-4
2.5
ACK vs. WAIT Handshaking .............................................................................. 2-4
2.6
Pin Descriptions ................................................................................................ 2-5
2.7
Pull-up Resistors and Unused Pins ................................................................... 2-7
2.8
The Bus Configuration Register (BCR) .............................................................. 2-7
2.8.1 WAIT vs. Ready Selection ...................................................................... 2-7
2.8.2 Bits and Fields in the BCR ...................................................................... 2-7
2.9
Register Addressing .......................................................................................... 2-8
2.9.1 Implicit Data Register Addressing .......................................................... 2-8
2.9.2 Direct Register Addressing on AD13-AD8 ............................................. 2-8
2.9.3 Direct Register Addressing on AD6-AD0/7-1 ......................................... 2-9
2.9.4 Indirect Register Addressing in the CCAR ............................................. 2-9
2.9.5 About the Register Address Tables ..................................................... 2-10
2.9.6 Serial Data Registers TDR & RDR ........................................................ 2-14
2.9.7 Byte Ordering ....................................................................................... 2-14
2.9.8 Register Read & Write Cycles .............................................................. 2-14
Z16C30 USC
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UM009402-0201