STM32W108C8 STMicroelectronics, STM32W108C8 Datasheet - Page 41

• Manufacturer Part Number: STM32W108C8
• Description: High-performance, IEEE 802.15.4 wireless system-on-chip with 64-Kybte Flash memory
• Manufacturer: STMicroelectronics

Specifications of STM32W108C8

• Receive Current (w/ Cpu): 27 mA
• Transmit Current (w/ Cpu, +3 Dbm Tx): 31 mA
• Low Deep Sleep Current, With Retained Ram And Gpio: 400 nA/800 nA with/without sleep timer
• Standard Arm Debug Capabilities: Flash patch and breakpoint; data watchpoint and trace; instrumentation trace macrocell
• Single Voltage Operation: 2.1-3.6 V with internal 1.8 V and 1.25 V regulators

STM32W108C8
6.3.6
Table 6.
Table 7.
31
15
31
15
30
14
30
14
In addition to these modes, further automatic control is invoked by hardware when flash
programming is enabled. To ensure accuracy of the flash controller's timers, the FCLK
frequency is forced to 12 MHz during flash programming and erase operations.
Table 5.
Clock switching registers
XTAL or OSCHF main clock select register (OSC24M_CTRL)
Address offset: 0x4000 401C
Reset value: 0x0000 0000
XTAL or OSCHF main clock select register (OSC24M_CTRL)
CPU clock source select register (CPU_CLK_SEL)
Address offset: 0x4000 4020
Reset value: 0x0000 0000
CPU clock source select register (CPU_CLK_SEL)
Bit 1 OSC24M_EN: When set to ‘1’, 24 MHz crystal oscillator is main clock.
Bit 0 OSC24M_SEL: When set to ‘0’, OSCHF is selected. When set to ‘1’, XTAL is selected.
OSC24M_SEL
1 (OSC24M)
1 (OSC24M)
29
13
29
13
0 (OSCHF)
0 (OSCHF)
28
12
28
12
System clock modes
27
11
27
11
CPU_CLK_SEL
0 (Normal CPU)
0 (Normal CPU)
1 (Fast CPU)
1 (Fast CPU)
26
10
26
10
25
25
9
9
Reserved
Doc ID 018587 Rev 2
Rserved
24
24
8
8
12 MHz
12 MHz
24 MHz
24 MHz
Reserved
Reserved
SCLK
23
7
23
7
22
6
22
6
12 MHz
12 MHz
6 MHz
6 MHz
PCLK
21
5
21
5
20
4
20
Erase Inactive
4
Program/
12 MHz
12 MHz
24 MHz
6 MHz
Flash
19
3
19
3
System modules
18
2
f
18
CLK
2
Erase Active
Program/
OSC24
M_EN
12 MHz
12 MHz
12 MHz
12 MHz
17
1
rws
Flash
17
1
LK_SEL
CPU_C
40/215
OSC24
M_SEL
rws
16
rws
0
16
0