MC9RS08KA2 Datasheet, PDF (15/132 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 1
MC9RS08KA2 Series Device Overview
1.1 Overview
The MC9RS08KA2 Series microcontroller unit (MCU) is an extremely low-cost, small pin count device
for home appliances, toys, and small geometry applications. This device is composed of standard on-chip
modules including, a very small and highly efficient RS08 CPU core, 63 bytes RAM, 2K bytes Flash, an
8-bit modulo timer, keyboard interrupt, and analog comparator. The device is available in small 6- and
8-pin packages.
1.2 MCU Block Diagram
The block diagram, Figure 1-1, shows the structure of the MC9RS08KA2 Series MCU.
RS08 CORE
BDC
CPU
5-BIT KEYBOARD
5
INTERRUPT MODULE
(KBI)
RS08 SYSTEM CONTROL
RESET AND STOP WAKEUP
MODES OF OPERATION
POWER MANAGEMENT
RTI
COP
WAKEUP
LVD
ANALOG COMPARATOR
MODULE
(ACMP)
MODULO TIMER
MODULE
(MTIM)
ACMP+
ACMP-
TCLK
ACMPO
PTA0/KBIP0/ACMP+ ⁽¹⁾
PTA1/KBIP1/ACMP- ⁽¹⁾
PTA2/KBIP2/TCLK/RESET/V_PP ^{(1),( 2)}
PTA3/ACMPO/BKGD/MS
PTA4/KBIP4 ^(1),(3)
PTA5/KBIP5 ^{(1), (3)}
USER FLASH
MC9RS08KA2 — 2048 BYTES
MC9RS08KA1 — 1024 BYTES
USER RAM — 63 BYTES
INTERNAL CLOCK
SOURCE
(ICS)
V_SS
POWER AND
V_DD
INTERNAL REGULATOR
NOTES:
(1) Pins are software configurable with pullup/pulldown device if input port.
(2) Integrated pullup device enabled if reset enabled (RSTPE=1).
(3) These pins are not available in 6-pin package.
Figure 1-1. MC9RS08KA2 Series Block Diagram
MC9RS08KA2 Series Data Sheet, Rev. 2
Freescale Semiconductor
15