Computers as Components, 2nd Edition

Questions 205

FURTHER READING

Shanley and Anderson [Min95] describe the PCI bus in detail. Dahlin [Dah00]

describes how to interface to a touchscreen. Collins [Col97] describes the design of

microprocessor in-circuit emulators. Ear nshaw et al. [Ear97] describe an advanced

debugging environment for the ARM architecture.

QUESTIONS

Q4-1 Draw a UML sequence diagram that shows a four-cycle handshake between

a bus master and a device.

Q4-2 Draw a timing diagram with the following signals (where [t

1

, t

2

] is the time

interval starting at t

1

and ending at t

2

):

a. Signal A is stable [0, 10], changing [10, 15], stable [15, 30].

b. Signal B is 1 [0, 5], falling [5 ...