diff --git a/README.md b/README.md
index 4656b6d..7c92096 100644
--- a/README.md
+++ b/README.md
@@ -25,16 +25,16 @@ Keypoints:
 Currently, supported chips are listed in `Cargo.toml` as feature flags,
 others should work if you are careful as most peripherals are similar enough.
 
-| Family | Status | Embassy | RCC | GPIO | UART* | SPI* | I2C | ADC | Timer(PWM) | EXTI* | RNG | DMA* | Delay |
-|--------|--------|---------|-----|------|-------|-----|-----|-----|------------|-------|-----|-------|-------|
-| V2/V3  |        | ✅      | ✅  | ✅   | ✅    | ✅  | ✅  | ✅  | ✅         | ✅    | ✅  | ✅    |       |
-| V1     |        |         | ✅  | ✅   | ✅    | ✅  | ✅  | ✅  | ✅         |       |     |       | ✅    |
-| V0     |        |         | ✅  | ✅   | ✅    | ✅  | ✅  | ❓  | ❓         |       |     |       | ✅    |
-| X0     |        | ✅      | ✅  | ✅   | ✅    | ✅  |     | ✅  | ✅         | ✅    |     | ✅    |       |
-| L0     | TODO   |         |     |      |       |     |     |     |            |       |     |       |       |
-| CH641  | TODO   |         |     |      |       |     |     |     |            |       |     |       |       |
-| CH643  | TODO   |         |     |      |       |     |     |     |            |       |     |       |       |
-| CH645  | TODO   |         |     |      |       |     |     |     |            |       |     |       |       |
+| Family | Status | Embassy | RCC | GPIO | UART*| SPI*| I2C | ADC | Timer(PWM) | EXTI*| RTC | DMA*| Delay | Others |
+|--------|--------|---------|-----|------|------|-----|-----|-----|------------|------|-----|-----|-------| ------ |
+| V2/V3  |        | ✅      | ✅  | ✅   | ✅   | ✅  | ✅  | ✅  | ✅         | ✅   |     | ✅  |       | RNG |
+| V1     |        |         | ✅  | ✅   | ✅   | ✅  | ✅  | ✅  | ✅         |      |     |     | ✅    | |
+| V0     |        |         | ✅  | ✅   | ✅   | ✅  | ✅  | ❓  | ✅         |      |     |     | ✅    | |
+| X0     |        | ✅      | ✅  | ✅   | ✅   | ✅  |     | ✅  | ✅         | ✅   |     | ✅  |       | |
+| L0     | TODO   |         |     |      |      |     |     |     |            |      |     |     |       | |
+| CH641  | TODO   |         |     |      |      |     |     |     |            |      |     |     |       | |
+| CH643  | TODO   |         |     |      |      |     |     |     |            |      |     |     |       | |
+| CH645  | TODO   |         |     |      |      |     |     |     |            |      |     |     |       | |
 
 - ✅ : Expected to work
 - ❓ : Not tested
diff --git a/examples/ch32v003/src/bin/pwm.rs b/examples/ch32v003/src/bin/pwm.rs
new file mode 100644
index 0000000..95a23ae
--- /dev/null
+++ b/examples/ch32v003/src/bin/pwm.rs
@@ -0,0 +1,44 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use hal::delay::Delay;
+use hal::println;
+use hal::time::Hertz;
+use hal::timer::low_level::CountingMode;
+use hal::timer::simple_pwm::{PwmPin, SimplePwm};
+use {ch32_hal as hal, panic_halt as _};
+
+#[qingke_rt::entry]
+fn main() -> ! {
+    hal::debug::SDIPrint::enable();
+    let p = hal::init(Default::default());
+
+    let pin = PwmPin::new_ch3::<3>(p.PD6);
+    let mut pwm = SimplePwm::new(
+        p.TIM2,
+        None,
+        None,
+        Some(pin),
+        None,
+        Hertz::khz(1),
+        CountingMode::default(),
+    );
+    let ch = hal::timer::Channel::Ch3;
+
+    let max_duty = pwm.get_max_duty();
+    println!("max duty: {}", max_duty);
+    pwm.set_duty(ch, 2000);
+    pwm.enable(ch);
+
+    loop {
+        for i in 0..100 {
+            pwm.set_duty(ch, i * 80);
+            Delay.delay_ms(1_0);
+        }
+        for i in (0..100).rev() {
+            pwm.set_duty(ch, i * 80);
+            Delay.delay_ms(1_0);
+        }
+    }
+}