EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 22

• Manufacturer Part Number: EZ80F91MCU
• Description: eZ80Acclaim-TM Flash Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

Figure 1. eZ80F91 Block Diagram
PS019209-0504
RTC_XOUT
RTC_VDD
DCD0/1
DSR0/1
DTR0/1
CTS0/1
RTS0/1
RxD0/1
TxD0/1
RTC_XIN
RI0/1
MISO
MOSI
SDA
SCK
SCL
WP
SS
Encoder/
Decoder
IrDA
Asynchronous
Transmitter
Real-Time
Clock and
Universal
Receiver/
Oscillator
Interface
Interface
Parallel
32KHz
UART
Serial
Serial
I2C
SPI
(2)
8-bit General
Purpose
I/O Port
GPIO
(4)
P R E L I M I N A R Y
MII Interface
Signals (18)
SRAM
Ethernet
Memory
8KB
256KB
MAC
Flash
System Clock
Oscillator,
Generator
PLL, and
Crystal
JTAG/ZDI
Controller
Controller
Interface
Interrupt
Arbiter
Debug
eZ80
CPU
Bus
Programmable
Interrupt
Timer/Counter
Vector
[8:0]
Reload
(4)
Chip Select
Wait State
Generator
BUSACK
BUSREQ
INSTRD
IORQ
MREQ
RD
WR
NMI
HALT_SLP
JTAG / ZDI Signals (5)
SRAM
&
8KB
Watchdog
POR/VBO
Product Specification
Timer
WDT
Architectural Overview
WAIT
CS0
CS1
CS2
CS3
eZ80F91 MCU
DATA[7:0]
ADDR[23:0]
Internal
Osc.
RC
RESET
3