ST10F280-JT3 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
View to exact match
ST10F280-JT3 Datasheet PDF : 186 Pages
| |||
ST10F280
Table 1 : Ball Description (continued)
Symbol
RD
WR/WRL
READY/
READY
ALE
EA
PORT0:
P0L.0 - P0L.7,
P0H.0 - P0H.7
Ball
Number
Type
Function
J14
O External Memory Read Strobe. RD is activated for every external instruction or
data read access.
J15
O 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.
J16
I Ready Input. The active level is programmable. When the Ready function is
enabled, the selected inactive level at this pin during an external memory access
will force the insertion of memory cycle time waitstates until the pin returns to the
selected active level.
J17
O Address Latch Enable Output. Can be used for latching the address into external
memory or an address latch in the multiplexed bus modes.
H17
I External Access Enable pin. A low level at this pin during and after Reset forces
the ST10F280 to begin instruction execution out of external memory. A high level
forces execution out of the internal Flash Memory.
I/O PORT0 consists of the two 8-bit bidirectional I/O ports P0L and P0H. 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.
In case of an external bus configuration, PORT0 serves as the address (A) and
address/data (AD) bus in multiplexed bus modes and as the data (D) bus in
demultiplexed bus modes.
Demultiplexed bus modes:
Data Path Width:
P0L.0 – P0L.7:
P0H.0 – P0H.7:
Multiplexed bus modes:
8-bit
D0 - D7
I/O
16-bit
D0 - D7
D8 - D15
Data Path Width:
P0L.0 – P0L.7:
P0H.0 – P0H.7:
8-bit
AD0 - AD7
A8 - A15
16-bit
AD0 - AD7
AD8 - AD15
H16 I/O P0L.0
H15 I/O P0L.1
H14 I/O P0L.2
G16 I/O P0L.3
G15 I/O P0L.4
G14 I/O P0L.5
F16 I/O P0L.6
E17 I/O P0L.7
F15 I/O P0H.0
E16 I/O P0H.1
F14 I/O P0H.2
D17 I/O P0H.3
E15 I/O P0H.4
D16 I/O P0H.5
C17 I/O P0H.6
E14 I/O P0H.7
12/186
|
|
Share Link: 