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CHAPTER 12 USB HOST ............................................................................................... 243
12.1
Feature of USB HOST .................................................................................................................... 244
12.2
Restriction on USB HOST .............................................................................................................. 245
12.3
Block Diagram of USB HOST ......................................................................................................... 246
12.4
Register of USB HOST ................................................................................................................... 247
12.4.1
Host Control Register 0,1(HCNT0/HCNT1) ............................................................................... 250
12.4.2
Host Interruption Register (HIRQ) ............................................................................................. 254
12.4.3
Host Error Status Register (HERR) ........................................................................................... 257
12.4.4
Host State Status Register (HSTATE) ....................................................................................... 260
12.4.5
SOF Interruption FRAME Comparison Register (HFCOMP) ..................................................... 263
12.4.6
Retry Timer Setting Register (HRTIMER) ................................................................................. 264
12.4.7
Host Address Register (HADR) ................................................................................................. 265
12.4.8
EOF Setting Register (HEOF) ................................................................................................... 266
12.4.9
FRAME Setting Register (HFRAME) ......................................................................................... 267
12.4.10 Host Token Endpoint Register (HTOKEN) ................................................................................ 268
12.5
Operation of USB HOST ................................................................................................................. 270
12.5.1
Connection of Device ................................................................................................................ 271
12.5.2
Reset of USB Bus ...................................................................................................................... 273
12.5.3
Token Packet ............................................................................................................................. 274
12.5.4
Data Packet ............................................................................................................................... 276
12.5.5
Handshake Packet .................................................................................................................... 277
12.5.6
Retry Function ........................................................................................................................... 278
12.5.7
SOF Interrupt ............................................................................................................................. 279
12.5.8
Error Status ............................................................................................................................... 281
12.5.9
Packet End ................................................................................................................................ 282
12.5.10 Suspend Resume ...................................................................................................................... 283
12.5.11 Cutting of Device ....................................................................................................................... 286
12.6
Each Token Flow Chart of USB HOST ........................................................................................... 287
CHAPTER 13 PWC TIMER ............................................................................................. 289
13.1
Overview of PWC Timer ................................................................................................................. 290
13.2
Register of PWC Timer ................................................................................................................... 292
13.2.1
PWC Control Status Register (PWCSR) ................................................................................... 293
13.2.2
PWC Data Buffer Register (PWCR) .......................................................................................... 298
13.2.3
PWC Ratio of Dividing Frequency Control Register (DIVR) ...................................................... 299
13.3
Movement of PWC Timer ............................................................................................................... 300
13.3.1
Operation of PWM Timer Functions .......................................................................................... 301
13.3.2
Operation of Pulse Width Measurement Function ..................................................................... 302
13.3.3
Count Clock Selection and Operation Mode Selection .............................................................. 303
13.3.4
Startup and Stop of Timer/Pulse Width Measurement .............................................................. 305
13.3.5
Operation of Timer Mode ........................................................................................................... 307
13.3.6
Operation of Pulse Width Measurement Mode .......................................................................... 310
13.4
Precautions when Using PWC Timer ............................................................................................. 315
CHAPTER 14 16-BIT RELOAD TIMER ........................................................................... 317
14.1
Overview of 16-bit Reload Timer .................................................................................................... 318
14.1.1
Function of 16-bit Reload Timer ................................................................................................ 319
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