Memory Map and Registers

Table 20-3. GPT Modules Memory Map (continued)

IPSBAR Offset

Bits 7–0

Access 1

 

 

GPTA

GPTB

 

 

 

 

 

 

0x1A_0010

0x1B_0010

GPT Channel 0 Register High (GPTC0H)

S

 

 

 

 

0x1A_0011

0x1Bb_0011

GPT Channel 0 Register Low (GPTC0L)

S

 

 

 

 

0x1A_0012

0x1B_0012

GPT Channel 1 Register High (GPTC1H)

S

 

 

 

 

0x1A_0013

0x1B_0013

GPT Channel 1 Register Low (GPTC1L)

S

 

 

 

 

0x1A_0014

0x1B_0014

GPT Channel 2 Register High (GPTC2H)

S

 

 

 

 

0x1A_0015

0x1B_0015

GPT Channel 2 Register Low (GPTC2L)

S

 

 

 

 

0x1A_0016

0x1B_0016

GPT Channel 3 Register High (GPTC3H)

S

 

 

 

 

0x1A_0017

0x1B_0017

GPT Channel 3 Register Low (GPTC3L)

S

 

 

 

 

0x1A_0018

0x1B_0018

Pulse Accumulator Control Register (GPTPACTL)

S

 

 

 

 

0x1A_0019

0x1B_0019

Pulse Accumulator Flag Register (GPTPAFLG)

S

 

 

 

 

0x1A_001A

0x1B_001A

Pulse Accumulator Counter Register High (GPTPACNTH)

S

 

 

 

 

0x1A_001B

0x1B_001B

Pulse Accumulator Counter Register Low (GPTPACNTL)

S

 

 

 

 

0x1A_001C

0x1B_001C

Reserved(2)

0x1A_001D

0x1B_001D

GPT Port Data Register (GPTPORT)

S

 

 

 

 

0x1A_001E

0x1B_001E

GPT Port Data Direction Register (GPTDDR)

S

 

 

 

 

0x1A_001F

0x1B_001F

GPT Test Register (GPTTST)

S

 

 

 

 

1S = CPU supervisor mode access only.

2Writes have no effect, reads return 0s, and the access terminates without a transfer error exception.

20.5.1GPT Input Capture/Output Compare Select Register (GPTIOS)

Field

Reset

R/W

Address

7

4

3

0

 

 

IOS

 

 

 

 

0000_0000

R/W

IPSBAR + 0x401A_0000, 0x401B_0000

Figure 20-2. GPT Input Capture/Output Compare Select Register (GPTIOS)

MOTOROLA

Chapter 20. General Purpose Timer Modules (GPTA and GPTB)

20-5

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Motorola MCF5281, MCF5282 user manual GPT Input Capture/Output Compare Select Register Gptios, Ios