mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 792

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 21 External Bus Interface (S12XEBIV2)
792
ITHRS
0
1
External Signal
TAGHI, TAGLO
TAGHI, TAGLO
DATA[15:8]
DATA[15:8]
DATA[7:0]
DATA[7:0]
EWAIT
EWAIT
ASIZ[4:0]
00000
00001
00010
00011
10110
10111
11111
Table 21-3. Input Threshold Levels on External Signals
:
:
Standard
Standard
NS
Table 21-4. External Address Bus Size
MC9S12XDP512 Data Sheet, Rev. 2.17
Standard
Standard
SS
Available External Address Lines
if EWAITE = 1
ADDR[21:1], UDS
ADDR[22:1], UDS
ADDR[2:1], UDS
if HDBE = 1
Standard
Reduced
Reduced
Reduced
ADDR1, UDS
NX
None
UDS
:
Standard
Standard
Reduced
Reduced
ES
if EWAITE = 1
Reduced
Standard
Reduced
Reduced
EX
Freescale Semiconductor
Standard
Reduced
Standard
ST