MC68HC705C9A_1 Datasheet, PDF (38/157 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
General Release Specification _{I/O Registers}
block of 16 registers. Figure 2-4 shows registers $0000 to $000F and
Figure 2-5 shows registers $0010 to $001F.
Addr
Register Name
$0000
Port A Data Register
$0001
Port B Data Register
$0002
Port C Data Register
$0003
Port D Data Register
$0004
Port A Data Direction Register
$0005
Port B Data Direction Register
$0006
Port C Data Direction Register
$0007 Port D Data Direction Register (C9A Only)
$0008
Unused
$0009
Unused
$000A
Serial Peripheral Control Register
$000B
Serial Peripheral Status Register
$000C
Serial Peripheral Data Register
$000D
Baud Rate Register
$000E Serial Communications Control Register 1
$000F Serial Communications Control Register 2
$0010 Serial Communications Status Register
$0011
Serial Communications Data Register
$0012
Timer Control Register
$0013
Timer Status Register
$0014
Input Capture Register High
$0015
Input Capture Register Low
$0016
Output Compare Register High
$0017
Output Compare Register Low
$0018
Timer Register High
$0019
Timer Register Low
$001A
Alternate Timer Register High
$001B
Alternate Timer Register Low
$001C
EPROM Programming Register
$001D
C9A COP Reset Register
$001E
C9A COP Control Register
$001F
Reserved
Figure 2-3. I/O Register Summary
MC68HC705C9A — Rev. 2.0
Memory
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