Texas Instruments CC2541 User Manual

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In the case when interrupt requests of the same priority level are received simultaneously, the polling
sequence shown in Table 2-8 is used to resolve the priority of each request. Note that the polling
sequence in Figure 2-4 is the algorithm found in Table 2-8, not that polling is among the IP bits as listed in
the figure.
IP1 (0xB9) – Interrupt Priority 1
Bit Name Reset R/W Description
7:6 – 00 R/W Reserved
5
IP1_IPG5
0 R/W Interrupt group 5, priority control bit 1, see Table 2-7: Interrupt Priority Groups
4
IP1_IPG4
0 R/W Interrupt group 4, priority control bit 1, see Table 2-7: Interrupt Priority Groups
3
IP1_IPG3
0 R/W Interrupt group 3, priority control bit 1, see Table 2-7: Interrupt Priority Groups
2
IP1_IPG2
0 R/W Interrupt group 2, priority control bit 1, see Table 2-7: Interrupt Priority Groups
1
IP1_IPG1
0 R/W Interrupt group 1, priority control bit 1, see Table 2-7: Interrupt Priority Groups
0
IP1_IPG0
0 R/W Interrupt group 0, priority control bit 1, see Table 2-7: Interrupt Priority Groups
IP0 (0xA9) – Interrupt Priority 0
Bit Name Reset R/W Description
7:6 – 00 R/W Reserved
5
IP0_IPG5
0 R/W Interrupt group 5, priority control bit 0, see Table 2-7: Interrupt Priority Groups
4
IP0_IPG4
0 R/W Interrupt group 4, priority control bit 0, see Table 2-7: Interrupt Priority Groups
3
IP0_IPG3
0 R/W Interrupt group 3, priority control bit 0, see Table 2-7: Interrupt Priority Groups
2
IP0_IPG2
0 R/W Interrupt group 2, priority control bit 0, see Table 2-7: Interrupt Priority Groups
1
IP0_IPG1
0 R/W Interrupt group 1, priority control bit 0, see Table 2-7: Interrupt Priority Groups
0
IP0_IPG0
0 R/W Interrupt group 0, priority control bit 0, see Table 2-7: Interrupt Priority Groups
Table 2-6. Priority Level Setting
IP1_x IP0_x Priority Level
0 0 0 – lowest
0 1 1
1 0 2
1 1 3 – highest
Table 2-7. Interrupt Priority Groups
Group Interrupts
IPG0 RFERR RF DMA
IPG1 ADC T1 P2INT
IPG2 URX0 T2 UTX0
IPG3 URX1 T3 UTX1
IPG4 ENC T4 P1INT
IPG5 ST P0INT WDT
50
8051 CPU SWRU191C–April 2009–Revised January 2012
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Texas Instruments CC2541 Specifications

General

Brand	Texas Instruments
Model	CC2541
Category	Microcontrollers
Language	English