参数资料
型号: SAX-XC878M-16FFI5V
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 24 MHz, RISC MICROCONTROLLER, PQFP64
封装: PLASTIC, TQFP-64
文件页数: 4/141页
文件大小: 2385K
代理商: SAX-XC878M-16FFI5V
XC878CLM
Functional Description
Data Sheet
94
V1.1, 2009-08
3.18
Timer 2 and Timer 21
Timer 2 and Timer 21 are 16-bit general purpose timers (THL2) that are fully compatible
and have two modes of operation, a 16-bit auto-reload mode and a 16-bit one channel
capture mode, see Table 33. As a timer, the timers count with an input clock of PCLK/12
(if prescaler is disabled). As a counter, they count 1-to-0 transitions on pin T2. In the
counter mode, the maximum resolution for the count is PCLK/24 (if prescaler is
disabled).
Table 33
Timer 2 Modes
Mode
Description
Auto-reload Up/Down Count Disabled
Count up only
Start counting from 16-bit reload value, overflow at FFFFH
Reload event configurable for trigger by overflow condition only, or by
negative/positive edge at input pin T2EX as well
Programmble reload value in register RC2
Interrupt is generated with reload event
Up/Down Count Enabled
Count up or down, direction determined by level at input pin T2EX
No interrupt is generated
Count up
– Start counting from 16-bit reload value, overflow at FFFFH
– Reload event triggered by overflow condition
– Programmble reload value in register RC2
Count down
– Start counting from FFFFH, underflow at value defined in register
RC2
– Reload event triggered by underflow condition
– Reload value fixed at FFFFH
Channel
capture
Count up only
Start counting from 0000H, overflow at FFFFH
Reload event triggered by overflow condition
Reload value fixed at 0000H
Capture event triggered by falling/rising edge at pin T2EX
Captured timer value stored in register RC2
Interrupt is generated with reload or capture event
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