SAB-C167CR-4R33M INFINEON [Infineon Technologies AG], SAB-C167CR-4R33M Datasheet - Page 24

• Manufacturer Part Number: SAB-C167CR-4R33M
• Description: 16-Bit Single-Chip Microcontroller
• Manufacturer: INFINEON [Infineon Technologies AG]

Table 3
Symbol Pin
EA
WR/
WRL
READY P9
ALE
P4
P4.0
P4.1
P4.2
P4.3
P4.4
P4.5
P4.6
P4.7
Data Sheet
Num.
M9
N9
P10
P6
M6
L6
N7
P7
M7
L7
N8
Pin Definitions and Functions P-BGA-176-2 (cont’d)
Input
Outp.
I
O
I
O
IO
O
O
O
O
O
O
I
O
O
O
Function
External Access Enable pin. A low level at this pin during and
after Reset forces the C167CR to begin instruction execution
out of external memory. A high level forces execution out of
the internal program memory.
“ROMless” versions must have this pin tied to ‘0’.
External Memory Write Strobe. In WR-mode this pin is
activated for every external data write access. In WRL-mode
this pin is activated for low byte data write accesses on a
16-bit bus, and for every data write access on an 8-bit bus.
See WRCFG in register SYSCON for mode selection.
Ready Input. When the Ready function is enabled, a high
level at this pin during an external memory access will force
the insertion of memory cycle time waitstates until the pin
returns to a low level.
An internal pull-up device will hold this pin high when nothing
is driving it.
Address Latch Enable Output. Can be used for latching the
address into external memory or an address latch in the
multiplexed bus modes.
Port 4 is an 8-bit bidirectional I/O port. It is bit-wise
programmable for input or output via direction bits. For a pin
configured as input, the output driver is put into high-
impedance state.
Port 4 can be used to output the segment address lines and
for serial bus interfaces:
A16
A17
A18
A19
A20
A21
CAN1_RxD CAN 1 Receive Data Input
A22
CAN1_TxD CAN 1 Transmit Data Output
A23
Least Significant Segment Address Line
Segment Address Line
Segment Address Line
Segment Address Line
Segment Address Line
Segment Address Line,
Segment Address Line,
Most Significant Segment Address Line
22
General Device Information
V3.3, 2005-02
C167CR
C167SR