C8051F326-TB Silicon Laboratories Inc, C8051F326-TB Datasheet - Page 79

• Manufacturer Part Number: C8051F326-TB
• Description: BOARD PROTOTYPING W/C8051F326
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F326-TB

• Contents: Board
• Processor To Be Evaluated: C8051F326/F327
• Interface Type: USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051F326
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

11. Port Input/Output
On-Chip digital resources are available through 15 I/O pins. Port pins are organized as shown in
Figure 11.1. Each of the Port pins can be used as general-purpose I/O (GPIO). Some port pins can be
dedicated to special signals such as /SYSCLK, UART TX and RX, and XTAL2 external clock input.
All Port I/Os are 5 V tolerant (refer to Figure 11.2 for the Port cell circuit). The Port I/O cells are configured
as either push-pull or open-drain in the Port Output Mode registers (PnMDOUT, where n = 0,2,3). Com-
plete Electrical Specifications for Port I/O are given in Table 11.1 on page 85.
/SYSCLK
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P2.0
P2.5
P3.0
UART
XTAL2
/INT0
/INT0
C2D
Figure 11.1. Port I/O Functional Block Diagram
GPIOCN.0
TMOD.3
TMOD.3
2
6
MUX
(P0.0 - OUT)
(P0.0 - IN)
Rev. 1.1
(P0.4 - OUT)
(P0.4 - IN)
(P0.5 - OUT)
(P0.5 - IN)
Cells
Cells
Cell
Cell
Cell
Cell
Cell
Cell
Cell
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
C8051F326/7
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P2.0
P2.5
P3.0
79