mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 828

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

Chapter 22 DP512 Port Integration Module (S12XDP512PIMV2)
Write: Anytime. In emulation modes, write operations will also be directed to the external bus.
828
PB[7:0]
Field
7–0
Port B — Port B pins 7–0 are associated with address outputs ADDR7 through ADDR1 respectively in expanded
modes. Pin 0 is associated with output ADDR0 in emulation modes and special test mode and with Upper Data
Select (UDS) in normal expanded mode. When this port is not used for external addresses, these pins can be
used as general purpose I/O. If the data direction bits of the associated I/O pins are set to logic level “1”, a read
returns the value of the port register, otherwise the buffered pin input state is read.
Table 22-5. PORTB Field Descriptions
MC9S12XDP512 Data Sheet, Rev. 2.17
Description
Freescale Semiconductor