Datasheet

Register Block
MC68HC812A4 Data Sheet, Rev. 7
30 Freescale Semiconductor
$0007
Port D Data Direction
Register (DDRD)
See page 67.
Read:
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Write:
Reset:00000000
$0008
Port E Data Register
(PORTE)
See page 68.
Read:
PE7 PE6 PE5 PD4 PD3 PD2 PD1 PD0
Write:
Reset:00001000
$0009
Port E Data Direction
Register (DDRE)
See page 68.
Read:
DDRE7 DDRE6 DDRE5 DDRE4 DDRE3 DDRE2 DDRE1 DDRE0
Write:
Reset:00000011
$000A
Port E Assignment
Register (PEAR)
See page 69.
Read:
ARSIE PLLTE PIPOE NECLK LSTRE RDWE 0 0
Write:
Reset:00101100
$000B
Mode Register
(MODE)
See page 58.
Read:
SMODN MODB MODA ESTR IVIS 0 EMD EME
Write:
Reset:00011011
$000C
Pullup Control
Register (PUCR)
See page 71.
Read:
PUPH PUPG PUPF PUPE PUPD PUC PUPB PUPA
Write:
Reset:11111111
$000D
Reduced Drive
Register (RDRIV)
See page 72.
Read:
RDPJ RDPH RDPG RDPF RDPE PRPD RDPC RDPAB
Write:
Reset:00000000
$000E Reserved RRRRRRRR
$000F Reserved RRRRRRRR
$0010
RAM Initialization Register
(INITRM)
See page 60.
Read:
RAM15RAM14RAM13RAM12RAM11 0 0 0
Write:
Reset:00001000
$0011
Register Initialization
Register (INITRG)
See page 59.
Read:
REG15 REG14 REG13 REG12 REG11 0 0 0
Write:
Reset:00000000
$0012
EEPROM Initialization
Register (INITEE)
See page 60.
Read:
EE15 EE14 EE13 EE12 0 0 0 EEON
Write:
Reset:00010001
$0013
Miscellaneous Mapping
Control Register (MISC)
See page 61.
Read:
EWDIRNDRC000000
Write:
Reset:00000000
Addr.Register Name Bit 7654321Bit 0
= Unimplemented
R
= Reserved U = Unaffected
Figure 2-1. Register Map (Sheet 2 of 14)