str712 STMicroelectronics, str712 Datasheet - Page 28

• Manufacturer Part Number: str712
• Description: 144/64-pin Arm7tdmi Mcu With Up To 256kb Flash, 64kb Ram And Emi
• Manufacturer: STMicroelectronics

System architecture
Table 7.
3.5
28/78
63 C4
64 A2
Pin n°
P0.8/U0.RX/U
0.TX
P0.9/U0.TX/B
OOT.0
Pin name
STR711/STR712/STR715 pin description
1. The Reset configuration of the I/O Ports is IPUPD (input pull-up/pull down). Refer to
2. V
External connections
Figure 5.
The Port bit configuration at reset is PC0=1, PC1=1, PC2=0. The port data register bit (PD) value depends
on the pu/pd column which specifies whether the pull-up or pull-down is enabled at reset
33IO-PLL
and V
I/O pd
I/O pd
Recommended external connection of V
33
are internally connected. V
C
C
Input
T
T
54 55
1µF
LQFP144
X 4mA
V
18BKP
129 128
V
33 nF
18
4mA
10 µF
58
V
Output
18
59
X
T
X
SSIO-PLL
Port 0.8
Note: This pin may be used for single wire UART
(half duplex) if programmed as Alternate Function
Output. The pin will be tri-stated except when
UART transmission is in progress
Port 0.9
function
and V
reset)
(after
Main
SS
25 26
1µF
are internally connected.
V
58
33 nF
18BKP
LQFP64
UART0:
Receive Data
input
Select Boot
Configuration
input
V
18 and
18
57
10 µF
27
V
18
V
28
18BKP
Alternate function
pins
Table 8 on page
UART0: Transmit data
output.
UART0: Transmit data
output
STR71xF
29.