ST10F280_12 datasheet(19/239 Pages) STMICROELECTRONICS

19 / 239 page

ST10F280

Ball data

Doc ID 8673 Rev. 3

19/239

P3.0 - P3.13,

P3.15

I/O

Port 3 is a 15-bit (P3.14 is missing) 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 3 outputs can be configured as push/pull or open drain

drivers. The input threshold of Port 3 is selectable (TTL or special).

The following Port 3 pins also serve for alternate functions:

R12

P3.0 T0IN CAPCOM Timer T0 Count Input

T13

P3.1 T6OUT GPT2 Timer T6 Toggle Latch Output

P12

P3.2 CAPIN GPT2 Register CAPREL Capture Input

R13

P3.3 T3OUT GPT1 Timer T3 Toggle Latch Output

T14

P3.4 T3EUD GPT1 Timer T3 External Up / Down Control Input

P13

P3.5 T4IN GPT1 Timer T4 Input for Count / Gate / Reload / Capture

R14

P3.6 T3IN GPT1 Timer T3 Count / Gate Input

P14

P3.7 T2IN GPT1 Timer T2 Input for Count / Gate / Reload / Capture

R15

I/O

P3.8 MRST SSC Master-Receive / Slave-Transmit I/O

R16

I/O

P3.9 MTSR SSC Master-Transmit / Slave-Receive O/I

N14

I/O

P3.10 TxD0 ASC0 Clock / Data Output (Asynchronous /

Synchronous)

P15

P3.11 RxD0 ASC0 Data Input (Asynchronous) or I/O

(Synchronous)

P16

P3.12 BHE External Memory High Byte Enable Signal, WRH

External Memory High Byte Write Strobe

M14

I/O

P3.13 SCLK SSC Master Clock Output / Slave Clock Input

T17

P3.15 CLKOUT System Clock Output (= CPU Clock)

Table 1.

Ball description (continued)

Symbol

Ball

number

Type

Function

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