Renesas UPD30541AGD-167-WML-A

Overview

UPD30541AGD-167-WML-A from NEC Electronics is a 64-bit MIPS RISC microprocessor implementing the VR5432 architecture, operating at 167 MHz core frequency with 32-bit multiplexed system bus, on-chip 32 KB instruction and 32 KB data caches, and integrated floating-point unit (FPU). It serves as a high-performance embedded CPU for real-time control in set-top boxes and page printer controllers.

For engineers reviewing the UPD30541AGD-167-WML-A datasheet, UPD30541AGD-167-WML-A pinout, UPD30541AGD-167-WML-A application, or UPD30541AGD-167-WML-A equivalent, key selection criteria include its 2.5 V core / 3.3 V I/O dual-supply operation, VR4300-compatible protocol mode via OptionR43K, DivMode-selectable clock division ratios (2:1 to 4:1), JTAG debug interface, and 208-pin QFP package with trace/debug signal support (TrcClk, TrcData[3:0], TrcEnd).

Technical Context

The UPD30541AGD-167-WML-A implements a dual-issue superscalar 5-stage pipeline with hardware branch prediction, supporting MIPS I–IV instruction sets plus multimedia and sum-of-products extensions. Its memory management unit includes a 48-entry TLB, and it supports both big- and little-endian addressing via the BigEndian pin.

System interface timing is synchronized to SysClock with configurable DivMode settings determining internal PClock-to-SysClock ratios (e.g., 2:1 yields 83.3 MHz external clock at 167 MHz core); valid handshake signals (ValidIn/ValidOut, RdRdy/WrRdy) and request arbitration (PReq/ExtRqst/Release) enable robust co-processor or peripheral interfacing without bus contention.

Key Specifications

Pinout & Package

UPD30541AGD-167-WML-A is housed in a 208-pin plastic QFP (fine pitch, 28 × 28 mm), with 0.5 mm lead pitch and 3.2 mm body height per JEDEC MS-026 standard. Power and ground pins are distributed across all four sides to minimize noise coupling; dedicated quiet supplies (VCCP/VCCIOP/VSSP) isolate PLL circuitry.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 64-bit RISC microprocessor applications.

Compared with µPD30541GD-167-WML and µPD30500GD-200-WML, UPD30541AGD-167-WML-A provides superior cache bandwidth and instruction set breadth for media-rich embedded systems, while maintaining pin and software compatibility with the base µPD30541GD-167-WML variant.

Availability

UPD30541AGD-167-WML-A is available at Aetrix Electronics and suitable for set-top box control, page printer controller, and amusement machine applications requiring stable component supply over extended product lifecycles.

Supply support for UPD30541AGD-167-WML-A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NEC Electronics (now part of Renesas Electronics) was a Japanese semiconductor manufacturer specializing in high-performance microprocessors, DRAM, and display drivers for consumer and industrial markets.

The VR Series microprocessors-including UPD30541AGD-167-WML-A-were designed for cost-sensitive, high-throughput embedded applications demanding MIPS compatibility, integrated peripherals, and scalable clock architectures.

FAQ

What is the core voltage requirement for UPD30541AGD-167-WML-A?

The UPD30541AGD-167-WML-A requires a tightly regulated 2.5 V ±5% supply on VCC pins for the processor core. Deviation beyond this range risks timing violations or functional failure. The I/O block uses a separate 3.3 V ±0.3 V supply (VCCIO), and both rails must be sequenced to avoid exceeding the 10 ms power-on delay limit specified in the preliminary datasheet.

Does UPD30541AGD-167-WML-A support JTAG boundary-scan testing?

Yes, UPD30541AGD-167-WML-A fully supports IEEE 1149.1 JTAG boundary-scan via dedicated pins JTCK, JTMS, JTDI, and JTDO. The JTAG interface operates asynchronously to SysClock and enables device identification, interconnect testing, and in-circuit debugging without requiring CPU execution resources.

How does the OptionR43K pin affect UPD30541AGD-167-WML-A system interface behavior?

When OptionR43K is asserted low, UPD30541AGD-167-WML-A configures its SysCmd bus as 5-bit (SysCmd[4:0]) and disables SysADC[3:0], matching VR4300 Series timing and signaling. When high, it enables full 9-bit SysCmd[8:0] and 4-bit SysADC[3:0] parity checking-critical for new designs requiring error detection on the system bus.

What trace capabilities does UPD30541AGD-167-WML-A provide?

UPD30541AGD-167-WML-A outputs real-time instruction trace via four dedicated signals: TrcClk (synchronous to SysClock), TrcData[3:0] (4-bit trace payload), and TrcEnd (packet delimiter). This allows hardware-assisted code profiling and exception analysis without software instrumentation overhead.

Can UPD30541AGD-167-WML-A operate with a 100 MHz external clock?

No. UPD30541AGD-167-WML-A's maximum guaranteed external clock frequency is 83.3 MHz (at DivMode = 2:1). Higher frequencies violate AC timing specifications and may cause data corruption on SysAD/SysCmd buses. The VR5000 series (e.g., µPD30500GD-200-WML) supports 100 MHz external clocks but lacks UPD30541AGD-167-WML-A's multimedia instruction set.