ST10F276E
Pin data
Table 1.
Symbol
Pin description (continued)
Pin
Type
Function
15-bit (P3.14 is missing) bidirectional I/O port, bit-wise programmable for input or
65-70,
73-80,
81
I/O output via direction bit. Programming an I/O pin as input forces the
I/O corresponding output driver to high impedance state. Port 3 outputs can be
I/O configured as push-pull or open drain drivers. The input threshold of Port 3 is
selectable (TTL or CMOS). The following Port 3 pins have alternate functions:
65
66
67
68
69
70
73
74
75
76
77
78
79
I
O
I
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
T0IN
CAPCOM1: timer T0 count input
T6OUT
CAPIN
T3OUT
T3EUD
T4IN
GPT2: timer T6 toggle latch output
GPT2: register CAPREL capture input
O
I
GPT1: timer T3 toggle latch output
GPT1: timer T3 external up/down control input
GPT1; timer T4 input for count/gate/reload/capture
GPT1: timer T3 count/gate input
I
P3.0 - P3.5
P3.6 - P3.13,
P3.15
I
T3IN
I
T2IN
GPT1: timer T2 input for count/gate/reload / capture
SSC0: master-receiver/slave-transmitter I/O
SSC0: master-transmitter/slave-receiver O/I
ASC0: clock / data output (asynchronous/synchronous)
ASC0: data input (asynchronous) or I/O (synchronous)
External memory high byte enable signal
External memory high byte write strobe
SSC0: master clock output / slave clock input
I/O P3.8
I/O P3.9
MRST0
MTSR0
O
P3.10 TxD0
I/O P3.11 RxD0
O
P3.12 BHE
WRH
80
81
I/O P3.13 SCLK0
P3.15 CLKOUT
System clock output (programmable divider on CPU
clock)
O
Doc ID 12303 Rev 3
19/235
STMICROELECTRONICS [ ST ]
