MAXQ610 Maxim, MAXQ610 Datasheet - Page 16

• Manufacturer Part Number: MAXQ610
• Description: The MAXQ610 is a low-power, 16-bit MAXQ® microcontroller designed for low-power applications including universal remote controls, consumer electronics, and white goods
• Manufacturer: Maxim

16-Bit Microcontroller with Infrared Module
Figure 4. External IRTXM (Modulator) Output
Figure 5. IR Capture
When configured in receive mode (IRMODE = 0), the IR
hardware supports the IRRX capture function. The
IRRXSEL[1:0] bits define which edge(s) of the IRRX pin
should trigger IR timer capture function.
The IR module starts operating in the receive mode
when IRMODE = 0 and IREN = 1. Once started, the IR
timer (IRV) starts up counting from 0000h when a quali-
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IR INTERRUPT
IRV INTERVAL
IRTXPOL = 1
IRTXPOL = 0
IRCLK
IRRX PIN
IRDATA
IRTXM
IRTXM
1
IRMT
IRCAH + 1
CARRIER GENERATION
0
IRMT
EDGE DETECT
IRCAL + 1
1
IR Receive
IRCFME
0
1
0
fied capture event as defined by IRRXSEL happens.
The IRV register is, by default, counting carrier cycles
as defined by the IRCA register. However, the IR carrier
frequency detect (IRCFME) bit can be set to 1 to allow
clocking of the IRV register directly with the IRCLK for
finer resolution. When IRCFME = 0, the IRCA defined
carrier is counted by IRV. When IRCFME = 1, the
IRCLK clocks the IRV register.
CARRIER MODULATION
RESET IRV TO 0000h
1
COPY IRV TO IRMT
0000h
ON EDGE DETECT
IRV
0
IR TIMER OVERFLOW
IR INTERRUPT
IRXRL
1
IRMT
INTERRUPT TO CPU
0
IRDATA
IRMT