SH7021 datasheet(25/509 Pages) RENESAS

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Table 1.1 Features of the SH7032 and SH7034 Microcomputers (cont)

Feature

Description

Direct memory access

controller (DMAC)

(4 channels)

Permits DMA transfer between the following modules:

• External memory

• External I/O

• On-chip memory

• Peripheral on-chip modules (except DMAC)

DMA transfer can be requested from external pins, on-chip SCI, on-

chip timers, and on-chip A/D converter

Cycle-steal mode or burst mode

Channel priority level is selectable

Channels 0 and 1: dual or single address transfer mode is

selectable; external request sources are supported; Channels 2 and

3: dual address transfer mode, internal request sources only

16-bit integrated-timer

Ten types of waveforms can be output

pulse unit (ITU)

Input pulse width and cycle can be measured

PWM mode: pulse output with 0–100% duty cycle (maximum

resolution: 50 ns)

Complementary PWM mode: can output a maximum of three pairs

of non-overlapping PWM waveforms

Phase counting mode: can count up or down according to the phase

of an external two-phase clock

Timing pattern controller

Maximum 16-bit output (4 bits

× 4 channels) can be output

(TPC)

Non-overlap intervals can be established between pairs of

waveforms

Timing-source timer is selectable

Watchdog timer (WDT)

Can be used as watchdog timer or interval timer

(1 channel)

Timer overflow can generate an internal reset, external signal, or

interrupt

Power-on reset or manual reset can be selected as the internal reset

Serial communication

Asynchronous or clocked synchronous mode is selectable

interface (SCI) (2 channels)

Can transmit and receive simultaneously (full duplex)

On-chip baud rate generator in each channel

Multiprocessor communication function

SH7021 Datasheet(PDF) 25 Page - Renesas Technology Corp

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