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ZBasic System Library
225
ZX Microcontroller Family
PWM
Type
Subroutine
Invocation
PWM(channel, dutyCycle)
PWM(channel, dutyCycle, status)
Parameter
Method
Type
Description
channel
ByVal
Byte
The channel to use for PWM generation.
dutyCycle
ByVal
Single or integral
The desired duty cycle.
status
ByRef
Boolean
The variable to receive the status value.
Discussion
This subroutine begins or modifies the generation of a 16-bit PWM signal on the specified channel. The
channel must have been previously prepared for PWM generation by calling OpenPWM(). PWM
generation is performed using one of the CPU’s 16-bit timers, the number of which varies depending on
the ZX model. The table below indicates the output pin for each PWM supported channel.
Output Pins for 16-bit PWM Channel Numbers
ZX Models
1
2
3
4
5
6
ZX-24, ZX-24a, ZX-24p, ZX-24n
26, D.5
27, D.4
-
-
-
-
ZX-40, ZX-40a, ZX-40p, ZX-40n
19, D.5
18, D.4
-
-
-
-
ZX-44, ZX-44a, ZX-44p, ZX-44n
14, D.5
13, D.4
-
-
-
-
ZX-24r, ZX-24s
26, D.5
27, D.4
B.6
B.7
-
-
ZX-40r, ZX-40s
19, D.5
18, D.4
7, B.6
8, B.7
-
-
ZX-44r, ZX-44s
14, D.5
13, D.4
2, B.6
3, B.7
-
-
ZX-24e, ZX-24ae, ZX-24ne, ZX-24pe,
ZX-24nu, ZX-24pu
15, D.5
16, D.4
-
-
-
-
ZX-24ru, ZX-24su
15, D.5
16, D.4
22, B.6
21, B.7
-
-
ZX-328n, ZX-328l
15, B.1
16, B.2
-
-
-
-
ZX-32n, ZX-32l
13, B.1
14, B.2
-
-
-
-
ZX-1281, ZX-1281n
15, B.5
16, B.6
17, B.7
5, E.3
6, E.4
7, E.5
ZX-1280, ZX-1280n
24, B.5
25, B.6
26, B.7
5, E.3
6, E.4
7, E.5
ZX-24x
26, D.0
27, D.1
D.4
D.5
12, C.0
11, C.1
ZX-32a4
20, D.0
21, D.1
24. D.4
25, D.5
10, C.0
11, C.1
ZX-24xu
20, D.0
19, D.1
16, D.4
15, D.5
12, C.0
11, C.1
ZX-128a1
25, D.0
26, D.1
27, D.4
28, D.5
15, C.0
16, C.1
ZX-128e, ZX-128ne,
ZX-1281e, ZX-1281ne
23, B.5
22, B.6
21, B.7
17, E.3
16, E.4
15, E.5
ZX-328nu
12, B.1
13, B.2
-
-
-
-
ZX Models
7
8
9
10
11
12
ZX-1280, ZX-1280n
15, H.3
16, H.4
17, H.5
38, L.3
39, L.4
40, L.5
ZX-24x
10, C.2
9, C.3
25, E.0
17, E.1
18, E.2
19, E.3
ZX-32a4
12, C.2
13, C.3
28, E.0
29, E.1
32, E.2
33, E.3
ZX-24xu
10, C.2
9, C.3
24, E.0
23, E.1
22, E.2
21, E.3
ZX-128a1
17, C.2
18, C.3
35, E.0
36, E.1
37, E.2
38, E.3
ZX Models
13
14
15
16
17
18
19
20
ZX-128a1
39, E.4
40, E.5
45, F.0
46, F.1
47, F.2
48, F.3
49, F.4
50, F.5
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