EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 150
EZ80F91MCU
Manufacturer Part Number
EZ80F91MCU
Description
eZ80Acclaim-TM Flash Microcontrollers
Manufacturer
ZILOG [Zilog, Inc.]
Datasheet
1.EZ80F91MCU.pdf
(396 pages)
- Current page: 150 of 396
- Download datasheet (5Mb)
eZ80F91 MCU
Product Specification
131
to 1 when the timer is loaded with the value
, which selects the maximum
0000h
time-out period.
The CPU can be programmed to poll the EOC bit for the time-out event. Alterna-
tively, an interrupt service request signal can be sent to the CPU by setting the
TMRx_IER[EOC] bit to 1. Then, when the end-of-count value (
) is reached
0000h
and the EOC bit is set to 1, an interrupt service request signal is passed to the
CPU. The interrupt service request signal is deactivated by an CPU Read of the
timer interrupt identification register, TMRx_IIR. All bits in that register are reset by
the Read.
The response of the CPU to this interrupt service request is a function of the
CPU’s interrupt enable flag, IEF1. For more information about this flag, refer to the
®
eZ80
CPU User Manual (UM0077), which is available on zilog.com.
Timer Input Source Selection
Timers 0–3 feature programmable input source selection. By default, the input is
taken from the eZ80F91’s system clock. The timers can also use the Real-Time
Clock source (50, 60, or 32768 Hz) as their clock sources. The input source for
these timers is set using the timer control register. (TMRx_CTL[CLK_SEL])
Timer Output
The timer count can be directed to the GPIO output pins if required. To enable the
Timer Out feature, the GPIO port pin must be configured as an output and for
alternate functions. The GPIO output pin toggles each time the timer reaches its
end-of-count value. In CONTINUOUS mode operation, enabling the Timer Output
feature results in a Timer Output signal period that is twice the timer time-out
period. Examples of the Timer Output operation are illustrated in Figure 28 and
Table 52. The initial value for the timer output is zero.
Logic to support timer output exists in all timers, but for the eZ80F91 device, only
Timer 0 and 2 route the actual timer output to the pins. Because Timer 3 uses the
T
pins for PWMxN signals, the timer outputs are not available when using
OUT
complementary PWM outputs. See
Table 53
for details.
PS019209-0504
P R E L I M I N A R Y
Programmable Reload Timers
Related parts for EZ80F91MCU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
KIT DEV EZ80 WEB SERVER
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 MPU 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 ACCLAIM 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC EZ80 ACCLAIM 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 20MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 8 BIT 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 50MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 50MHZ XTEMP 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC WEBSERVER 20MHZ 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC ACCLAIM MCU 64KB 100LQFP
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
IC ACCLAIM MCU 64KB 100LQFP
Manufacturer:
Zilog
Datasheet: